diff --git a/scripts/backup b/scripts/backup
index d8dc4cc..e6dbef0 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -26,8 +26,7 @@ domain=$(sudo yunohost app setting $app domain)
 backup_dir=$YNH_APP_BACKUP_DIR
 
 # Backup sources & data
-ynh_backup "/var/www/$app" "sources"
+ynh_backup "/var/www/$app" "./sources"
 
 # Copy Nginx conf
-sudo mkdir -p ./conf
-ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "conf/nginx.conf"
+ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "./conf/nginx.conf"
diff --git a/scripts/install b/scripts/install
index 6f2d906..b7ad447 100755
--- a/scripts/install
+++ b/scripts/install
@@ -1,43 +1,51 @@
 #!/bin/bash
-APP=`echo -n doku; echo wiki`
-# Retrieve arguments
-domain=$1
-path=$2
-admin=$3
-is_public=$4
 
-# Save app settings
-sudo yunohost app setting dokuwiki admin -v "$admin" 
-sudo yunohost app setting dokuwiki is_public -v "$is_public" 
+# causes the shell to exit if any subcommand or pipeline returns a non-zero status
+set -e
+
+# This is a multi-instance app, meaning it can be installed several times independently
+# The id of the app as stated in the manifest is available as $YNH_APP_ID
+# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
+# The app instance name is available as $YNH_APP_INSTANCE_NAME
+#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
+#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
+#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
+# The app instance name is probably what you are interested the most, since this is
+# guaranteed to be unique. This is a good unique identifier to define installation path,
+# db names, ...
+app=$YNH_APP_INSTANCE_NAME
+
+# Retrieve arguments
+domain=$YNH_APP_ARG_DOMAIN
+path=$YNH_APP_ARG_PATH
+admin=$YNH_APP_ARG_ADMIN
+is_public=$YNH_APP_ARG_IS_PUBLIC
+
+# Remove trailing slash to path
+path=${path%/}
+#force location to be / or /foo
+location=${path:-/}
+
 
 # Check domain/path availability
-sudo yunohost app checkurl $domain$path -a dokuwiki
+sudo yunohost app checkurl $domain$path -a $app
 if [[ ! $? -eq 0 ]]; then
     exit 1
 fi
 
-# Path need a trailing slash, and location does not.
-# See conf/nginx.conf usage
-location=$path
-if [[ ! $path == */ ]]; then
-    # no trailing slash, so add it
-    path=$path/
-fi
-if [[ ! "$location" == "/" ]]; then
-    # remove possible trailing slash
-    location=${location%/}
-fi
-
+# Save app settings
+sudo yunohost app setting $app admin -v "$admin" 
+sudo yunohost app setting $app is_public -v "$is_public" 
 
 
 # Modify dokuwiki conf
-sed -i "s@YNH_ADMIN_USER@$admin@g" ../conf/$APP.php
+sed -i "s@YNH_ADMIN_USER@$admin@g" ../conf/dokuwiki.php
 
 # Copy files to the right place
-final_path=/var/www/dokuwiki
+final_path=/var/www/$app
 sudo mkdir -p $final_path
 sudo cp -a ../sources/* $final_path
-sudo cp ../conf/$APP.php $final_path/conf
+sudo cp ../conf/dokuwiki.php $final_path/conf
 sudo cp ../conf/acl.auth.php $final_path/conf
 
 # Files owned by root, www-data can just read
@@ -47,18 +55,18 @@ sudo chown -R root: $final_path
 
 # except for conf, data, some data subfolders, and lib/plugin, where www-data must have write permissions
 sudo chown -R www-data:root $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins}
-sudo chmod -R 700 $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins}
+sudo chmod -R 700           $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins}
 
 # Modify Nginx configuration file and copy it to Nginx conf directory
 sed -i "s@YNH_WWW_LOCATION@$location@g" ../conf/nginx.conf
 sed -i "s@YNH_WWW_PATH@$path@g" ../conf/nginx.conf
 sed -i "s@YNH_WWW_ALIAS@$final_path/@g" ../conf/nginx.conf
-sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/dokuwiki.conf
+sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf
 
 
 if [ "$is_public" = "Yes" ];
 then
-  sudo yunohost app setting dokuwiki unprotected_uris -v "/"
+  sudo yunohost app setting $app unprotected_uris -v "/"
 fi
 
 sudo service nginx reload
diff --git a/scripts/remove b/scripts/remove
index f4e5625..47803f1 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,6 +1,18 @@
 #!/bin/bash
 
-domain=$(sudo yunohost app setting dokuwiki domain)
+# This is a multi-instance app, meaning it can be installed several times independently
+# The id of the app as stated in the manifest is available as $YNH_APP_ID
+# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
+# The app instance name is available as $YNH_APP_INSTANCE_NAME
+#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
+#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
+#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
+# The app instance name is probably what you are interested the most, since this is
+# guaranteed to be unique. This is a good unique identifier to define installation path,
+# db names, ...
+app=$YNH_APP_INSTANCE_NAME
 
-sudo rm -rf /var/www/dokuwiki
-sudo rm -f /etc/nginx/conf.d/$domain.d/dokuwiki.conf
+domain=$(sudo yunohost app setting $app domain)
+
+sudo rm -rf /var/www/$app
+sudo rm -f /etc/nginx/conf.d/$domain.d/$app.conf
diff --git a/scripts/restore b/scripts/restore
index 281984c..3d2dd75 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -50,10 +50,6 @@ fi
 # Restore sources & data
 sudo cp -a "./sources" $final_path
 
-# Set permissions
-sudo chown -R www-data:root $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins}
-sudo chmod -R 700 $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins}
-
 # Restore conf files
 sudo cp -a "./conf/nginx.conf" $conf
 
diff --git a/scripts/upgrade b/scripts/upgrade
index f680a83..51ea551 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,38 +1,47 @@
 #!/bin/bash
-APP=`echo -n doku;echo wiki`
-domain=$(sudo yunohost app setting dokuwiki domain)
-path=$(sudo yunohost app setting dokuwiki path)
-admin=$(sudo yunohost app setting dokuwiki admin)
-is_public=$(sudo yunohost app setting dokuwiki is_public)
+
+# causes the shell to exit if any subcommand or pipeline returns a non-zero status
+set -e
+
+# This is a multi-instance app, meaning it can be installed several times independently
+# The id of the app as stated in the manifest is available as $YNH_APP_ID
+# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
+# The app instance name is available as $YNH_APP_INSTANCE_NAME
+#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
+#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
+#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
+# The app instance name is probably what you are interested the most, since this is
+# guaranteed to be unique. This is a good unique identifier to define installation path,
+# db names, ...
+app=$YNH_APP_INSTANCE_NAME
+
+# Retrieve arguments
+domain=$YNH_APP_ARG_DOMAIN
+path=$YNH_APP_ARG_PATH
+admin=$YNH_APP_ARG_ADMIN
+is_public=$YNH_APP_ARG_IS_PUBLIC
+
+# Remove trailing slash to path
+path=${path%/}
+#force location to be / or /foo
+location=${path:-/}
 
 # admin default value, if not set
 if [ -z "$admin" ];
 then
     admin=$(sudo yunohost user list | grep 'username' -m1 | awk '{print $2}')
-    sudo yunohost app setting dokuwiki is_public -v "$is_public"
+    sudo yunohost app setting $app is_public -v "$is_public"
 fi
 
 
-# Path need a trailing slash, and location does not.
-# See conf/nginx.conf usage
-location=$path
-if [[ ! $path == */ ]]; then
-    # no trailing slash, so add it
-    path=$path/
-fi
-if [[ ! "$location" == "/" ]]; then
-    # remove possible trailing slash
-    location=${location%/}
-fi
-
 # Modify dokuwiki conf
-sed -i "s@YNH_ADMIN_USER@$admin@g" ../conf/$APP.php
+sed -i "s@YNH_ADMIN_USER@$admin@g" ../conf/dokuwiki.php
 
 # Copy files to the right place
-final_path=/var/www/dokuwiki
+final_path=/var/www/$app
 sudo mkdir -p $final_path
 sudo cp -a ../sources/* $final_path
-sudo cp ../conf/$APP.php $final_path/conf
+sudo cp ../conf/dokuwiki.php $final_path/conf
 sudo cp ../conf/acl.auth.php $final_path/conf
 
 # Remove upgrade notification
@@ -56,12 +65,12 @@ sudo chmod -R 700 $final_path/{conf,data,data/attic,data/cache,data/index,data/l
 sed -i "s@YNH_WWW_LOCATION@$location@g" ../conf/nginx.conf
 sed -i "s@YNH_WWW_PATH@$path@g" ../conf/nginx.conf
 sed -i "s@YNH_WWW_ALIAS@$final_path/@g" ../conf/nginx.conf
-sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/dokuwiki.conf
+sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf
 
 if [ "$is_public" = "Yes" ];
 then
-  sudo yunohost app setting dokuwiki skipped_uris -d
-  sudo yunohost app setting dokuwiki unprotected_uris -v "/"
+  sudo yunohost app setting $app skipped_uris -d
+  sudo yunohost app setting $app unprotected_uris -v "/"
 fi
 
 sudo service nginx reload