diff --git a/scripts/change_url b/scripts/change_url
index 74e8caf..5ab9bed 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -30,6 +30,9 @@ ynh_print_info --message="Loading installation settings..."
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 # Add settings here as needed by your application
+#db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+#db_user=$db_name
+#db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
 port=$(ynh_app_setting_get --app=$app --key=port)
 
 #=================================================
@@ -50,6 +53,13 @@ fi
 
 #=================================================
 # STANDARD MODIFICATIONS
+#=================================================
+# STOP SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Stopping a systemd service..."
+
+ynh_systemd_action --service_name=$app --action=stop --log_path=systemd --line_match="Stopped Distbin Service"
+
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
@@ -81,15 +91,10 @@ fi
 
 #=================================================
 # SPECIFIC MODIFICATIONS
-#=================================================
-# STOP SERVICE
-#=================================================
-
-ynh_systemd_action --action=stop --service_name=$app --log_path=systemd --line_match="Stopped Distbin Service"
-
 #=================================================
 # MODIFY A CONFIG FILE
 #=================================================
+ynh_print_info --message="Modifying config file..."
 
 # Change the URL in the configuration file
 
@@ -102,19 +107,25 @@ fi
 
 ynh_replace_string --match_string="EXTERNAL_URL=.*" --replace_string="EXTERNAL_URL=https://$new_domain_uri/" --target_file="$final_path/.env"
 
+#=================================================
+# STORE THE CONFIG FILE CHECKSUM
+#=================================================
+ynh_print_info --message="Storing the config file checksum..."
+
 ynh_backup_if_checksum_is_different --file="$final_path/.env"
 # Recalculate and store the checksum of the file for the next upgrade.
 ynh_store_file_checksum --file="$final_path/.env"
 
 #=================================================
-# START SERVICE
+# GENERIC FINALISATION
 #=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
 
 ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Started Distbin Service"
 sleep 10
 
-#=================================================
-# GENERIC FINALISATION
 #=================================================
 # RELOAD NGINX
 #=================================================
diff --git a/scripts/install b/scripts/install
index 99333d9..899e2b7 100644
--- a/scripts/install
+++ b/scripts/install
@@ -54,24 +54,24 @@ ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 #=================================================
 # FIND AND OPEN A PORT
 #=================================================
-ynh_print_info --message="Configuring firewall ..."
+ynh_print_info --message="Configuring firewall..."
 
 # Find a free port
-port=$(ynh_find_port 8095)
+port=$(ynh_find_port --port=8095)
 ynh_app_setting_set --app=$app --key=port --value=$port
 
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
-ynh_print_info --message="Installing dependencies ..."
+ynh_print_info --message="Installing dependencies..."
 
 ynh_install_app_dependencies $pkg_dependencies
-ynh_install_nodejs 10
+ynh_install_nodejs --nodejs_version="10"
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
-ynh_print_info --message="Setting up source files ..."
+ynh_print_info --message="Setting up source files..."
 
 ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
@@ -88,16 +88,17 @@ ynh_add_nginx_config
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
-ynh_print_info --message="Configuring system user ..."
+ynh_print_info --message="Configuring system user..."
 
 # Create a system user
-ynh_system_user_create "$app" "$final_path"
+ynh_system_user_create --username="$app" --home_dir="$final_path"
 
 #=================================================
 # SPECIFIC SETUP
 #=================================================
 # CREATE LOG FOLDER
 #=================================================
+ynh_print_info --message="Creating log folder..."
 
 mkdir -p "/var/log/$app"
 chown -R "$app":"$app" "/var/log/$app"
@@ -105,16 +106,19 @@ chown -R "$app":"$app" "/var/log/$app"
 #=================================================
 # CREATE DB FOLDER
 #=================================================
+ynh_print_info --message="Creating DB folder..."
 
 mkdir -p "$final_path/distbin-db"
 mkdir -p "$final_path/distbin-db/activities"
 mkdir -p "$final_path/distbin-db/inbox"
 
 #=================================================
-# MAKE SETUP
+# INSTALLING DISTBIN
 #=================================================
+ynh_print_info --message="Installing distin..."
 
 chown -R "$app":"$app" "$final_path"
+
 pushd $final_path
     ynh_use_nodejs
     sudo -u $app env PATH=$PATH npm install --ignore-scripts
@@ -126,11 +130,10 @@ pushd $final_path/dist
     sudo -u $app env PATH=$PATH npm install --ignore-scripts  --production
 popd
 
-
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_print_info --message="Configuring a systemd service ..."
+ynh_print_info --message="Configuring a systemd service..."
 
 # Create a dedicated systemd config
 ynh_add_systemd_config
@@ -138,6 +141,7 @@ ynh_add_systemd_config
 #=================================================
 # MODIFY A CONFIG FILE
 #=================================================
+ynh_print_info --message="Modifying a config file..."
 
 cp "../conf/.env" "$final_path/.env"
 
@@ -156,6 +160,7 @@ ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path"
 #=================================================
 # STORE THE CONFIG FILE CHECKSUM
 #=================================================
+ynh_print_info --message="Storing the config file checksum..."
 
 # Calculate and store the config file checksum into the app settings
 ynh_store_file_checksum --file="$final_path/.env"
@@ -165,6 +170,7 @@ ynh_store_file_checksum --file="$final_path/.env"
 #=================================================
 # SECURE FILES AND DIRECTORIES
 #=================================================
+ynh_print_info --message="Securing files and directories..."
 
 # Set permissions to app files
 chown -R "$app":"$app" "$final_path"
@@ -172,7 +178,7 @@ chown -R "$app":"$app" "$final_path"
 #=================================================
 # SETUP LOGROTATE
 #=================================================
-ynh_print_info --message="Configuring log rotation ..."
+ynh_print_info --message="Configuring log rotation..."
 
 # Use logrotate to manage application logfile(s)
 ynh_use_logrotate
@@ -180,15 +186,24 @@ ynh_use_logrotate
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
+ynh_print_info --message="Advertising service in admin panel..."
 
 #yunohost service add $app --log "/var/log/$app/$app.log"
 # if using yunohost version 3.2 or more in the 'manifest.json', a description can be added
 yunohost service add $app --description "$app daemon for distbin" --log "/var/log/$app/$app.log"
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
+
+ynh_systemd_action --service_name=$app --action=start --log_path=systemd --line_match="Started Distbin Service"
+sleep 10
+
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_print_info --message="Configuring SSOwat ..."
+ynh_print_info --message="Configuring SSOwat..."
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
@@ -202,14 +217,7 @@ fi
 #=================================================
 ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# START SERVICE
-#=================================================
-
-ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Started Distbin Service"
-sleep 10
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/remove b/scripts/remove
index a797fe9..e1a3a52 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -29,14 +29,14 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 # Remove a service from the admin panel, added by `yunohost service add`
 if yunohost service status $app >/dev/null 2>&1
 then
-	ynh_print_info --message="Removing $app service"
+	ynh_print_info --message="Removing $app service..."
 	yunohost service remove $app
 fi
 
 #=================================================
 # STOP AND REMOVE SERVICE
 #=================================================
-ynh_print_info --message="Stopping and removing the systemd service"
+ynh_print_info --message="Stopping and removing the systemd service..."
 
 # Remove the dedicated systemd config
 ynh_remove_systemd_config
@@ -44,7 +44,7 @@ ynh_remove_systemd_config
 #=================================================
 # REMOVE DEPENDENCIES
 #=================================================
-ynh_print_info --message="Removing dependencies"
+ynh_print_info --message="Removing dependencies..."
 
 # Remove metapackage and its dependencies
 ynh_remove_app_dependencies
@@ -53,7 +53,7 @@ ynh_remove_nodejs
 #=================================================
 # REMOVE APP MAIN DIR
 #=================================================
-ynh_print_info --message="Removing app main directory"
+ynh_print_info --message="Removing app main directory..."
 
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
@@ -61,7 +61,7 @@ ynh_secure_remove --file="$final_path"
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
-ynh_print_info --message="Removing nginx web server configuration"
+ynh_print_info --message="Removing nginx web server configuration..."
 
 # Remove the dedicated nginx config
 ynh_remove_nginx_config
@@ -69,7 +69,7 @@ ynh_remove_nginx_config
 #=================================================
 # REMOVE LOGROTATE CONFIGURATION
 #=================================================
-ynh_print_info --message="Removing logrotate configuration"
+ynh_print_info --message="Removing logrotate configuration..."
 
 # Remove the app-specific logrotate config
 ynh_remove_logrotate
@@ -77,11 +77,10 @@ ynh_remove_logrotate
 #=================================================
 # CLOSE A PORT
 #=================================================
-ynh_print_info --message="Closing a port..."
 
 if yunohost firewall list | grep -q "\- $port$"
 then
-	ynh_print_info --message="Closing port $port"
+	ynh_print_info --message="Closing port $port..."
 	ynh_exec_warn_less yunohost firewall disallow TCP $port
 fi
 
@@ -99,7 +98,7 @@ ynh_secure_remove --file="/var/log/$app/"
 #=================================================
 # REMOVE DEDICATED USER
 #=================================================
-ynh_print_info --message="Removing the dedicated system user"
+ynh_print_info --message="Removing the dedicated system user..."
 
 # Delete a system user
 ynh_system_user_delete --username=$app
diff --git a/scripts/restore b/scripts/restore
index e745f06..55505bd 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -68,6 +68,7 @@ ynh_system_user_create --username=$app --home_dir=$final_path
 #=================================================
 # RESTORE USER RIGHTS
 #=================================================
+ynh_print_info --message="Securing files and directories..."
 
 # Restore permissions on app files
 chown -R "$app":"$app" "$final_path"
@@ -77,6 +78,7 @@ chown -R "$app":"$app" "$final_path"
 #=================================================
 # CREATE LOG FOLDER
 #=================================================
+ynh_print_info --message="Creating log folder..."
 
 mkdir -p "/var/log/$app"
 chown -R "$app":"$app" "/var/log/$app"
@@ -88,7 +90,7 @@ ynh_print_info --message="Reinstalling dependencies..."
 
 # Define and install dependencies
 ynh_install_app_dependencies $pkg_dependencies
-ynh_install_nodejs 10
+ynh_install_nodejs --nodejs_version="10"
 
 #=================================================
 # RESTORE SYSTEMD
@@ -102,9 +104,18 @@ systemctl daemon-reload
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
+ynh_print_info --message="Advertising service in admin panel..."
 
 yunohost service add $app --log "/var/log/$app/$app.log"
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
+
+ynh_systemd_action --service_name=$app --action=start --log_path=systemd --line_match="Started Distbin Service"
+sleep 10
+
 #=================================================
 # RESTORE THE LOGROTATE CONFIGURATION
 #=================================================
@@ -118,21 +129,7 @@ ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 #=================================================
 ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# CREATE LOG FOLDER
-#=================================================
-
-mkdir -p "/var/log/$app"
-chown -R "$app":"$app" "/var/log/$app"
-
-#=================================================
-# START SERVICE
-#=================================================
-
-ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Started Distbin Service"
-sleep 10
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/upgrade b/scripts/upgrade
index 5c9d7fa..3e3b9c8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -22,6 +22,12 @@ is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 port=$(ynh_app_setting_get --app=$app --key=port)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -37,7 +43,7 @@ elif [ "$is_public" = "No" ]; then
 fi
 
 # If final_path doesn't exist, create it
-if [ -z $final_path ]; then
+if [ -z "$final_path" ]; then
 	final_path=/var/www/$app
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
@@ -57,21 +63,28 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
-#=================================================
-# STOP SERVICE
-#=================================================
-
-ynh_systemd_action --action=stop --service_name=$app
-
 #=================================================
 # STANDARD UPGRADE STEPS
+#=================================================
+# STOP SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Stopping a systemd service..."
+
+ynh_systemd_action --service_name=$app --action=stop
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 ynh_print_info --message="Upgrading source files..."
 
 # Download, check integrity, uncompress and patch the source from app.src#
-ynh_setup_source --dest_dir="$final_path"
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
+	ynh_script_progression --message="Upgrading source files..." --time --weight=1
+
+	# Download, check integrity, uncompress and patch the source from app.src
+	ynh_setup_source --dest_dir="$final_path"
+fi
 
 #=================================================
 # NGINX CONFIGURATION
@@ -87,8 +100,7 @@ ynh_add_nginx_config
 ynh_print_info --message="Upgrading dependencies..."
 
 ynh_install_app_dependencies $pkg_dependencies
-ynh_remove_nodejs
-ynh_install_nodejs 10
+ynh_install_nodejs --nodejs_version="10"
 
 #=================================================
 # CREATE DEDICATED USER
@@ -100,9 +112,18 @@ ynh_system_user_create --username=$app --home_dir=$final_path
 
 #=================================================
 # SPECIFIC UPGRADE
+#=================================================
+# CREATE LOG FOLDER
+#=================================================
+ynh_print_info --message="Creating log folder..."
+
+mkdir -p "/var/log/$app"
+chown -R "$app":"$app" "/var/log/$app"
+
 #=================================================
 # CREATE STORAGE FOLDER
 #=================================================
+ynh_print_info --message="Creating storage folder..."
 
 DIRECTORY="$final_path/db"
 #Move old db
@@ -113,6 +134,7 @@ fi
 #=================================================
 # MAKE INSTALL
 #=================================================
+ynh_print_info --message="Making install..."
 
 chown -R "$app":"$app" "$final_path"
 pushd $final_path
@@ -129,6 +151,7 @@ popd
 #=================================================
 # MODIFY A CONFIG FILE
 #=================================================
+ynh_print_info --message="Modifying config file..."
 
 cp "../conf/.env" "$final_path/.env"
 
@@ -144,6 +167,11 @@ ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_f
 ynh_replace_string --match_string="__DOMAIN_URI__" --replace_string="$domain_uri" --target_file="$final_path/.env"
 ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$final_path/.env"
 
+#=================================================
+# STORE THE CONFIG FILE CHECKSUM
+#=================================================
+ynh_print_info --message="Storing the config file checksum..."
+
 ynh_backup_if_checksum_is_different --file="$final_path/.env"
 # Recalculate and store the checksum of the file for the next upgrade.
 ynh_store_file_checksum --file="$final_path/.env"
@@ -169,17 +197,11 @@ ynh_add_systemd_config
 #=================================================
 # SECURE FILES AND DIRECTORIES
 #=================================================
+ynh_print_info --message="Securing files and directories..."
 
 # Set permissions on app files
 chown -R $app:$app $final_path
 
-#=================================================
-# CREATE LOG FOLDER
-#=================================================
-
-mkdir -p "/var/log/$app"
-chown -R "$app":"$app" "/var/log/$app"
-
 #=================================================
 # SETUP SSOWAT
 #=================================================
@@ -192,19 +214,20 @@ then
 	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
 fi
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
+
+ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Started Distbin Service"
+sleep 10
+
 #=================================================
 # RELOAD NGINX
 #=================================================
 ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# START SERVICE
-#=================================================
-
-ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Started Distbin Service"
-sleep 10
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT