diff --git a/check_process b/check_process
index 7180c48..91fcf3d 100644
--- a/check_process
+++ b/check_process
@@ -42,7 +42,7 @@
 	Level 1=auto
 	Level 2=auto
 	Level 3=auto
-	Level 4=0
+	Level 4=na
 	Level 5=auto
 	Level 6=auto
 	Level 7=auto
diff --git a/scripts/upgrade b/scripts/upgrade
index 91bac98..875de9c 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,7 +21,13 @@ admin=$(ynh_app_setting_get $app admin)
 is_public=$(ynh_app_setting_get $app is_public)
 final_path=$(ynh_app_setting_get $app final_path)
 language=$(ynh_app_setting_get $app language)
-calibre_dir=$(ynh_app_setting_get $app calibre_dir)
+
+#Get settings from database in case it has been changed in the app
+calibre_dir=$(sqlite3 $final_path/app.db "SELECT config_calibre_dir FROM settings WHERE ID=1")
+#Save it in settings so that it can be used back afterward
+calibre_dir=${calibre_dir%/}
+ynh_app_setting_set $app calibre_dir $calibre_dir
+
 port=$(ynh_app_setting_get $app port)