update docs

Author: arch

docs/app/docs/user-guide/ofs-integration.md

@@ -58,7 +58,8 @@ Manual Installation:
 8. Extract the Downloaded `funscript-editor_vx.x.x.zip` into `%APPDATA%\OFS\OFS_data\extension\Funscript Generator Windows\funscript-editor`.
 9. Now check that the file `%APPDATA%\OFS\OFS_data\extension\Funscript Generator Windows\funscript-editor\funscript-editor.exe` exists.
 10. Download the [lua wrapper script](https://raw.githubusercontent.com/michael-mueller-git/Python-Funscript-Editor/main/contrib/Installer/assets/main.lua). Open the URL in your Browser and press `CTRL+S`. Then save the file as `main.lua` to the Directory `%APPDATA%\OFS\OFS_data\extension\Funscript Generator Windows`.
-11. Open OFS, activate the extension (3) and enable the window (4). Now you can use the extension at any position in the Video with the _Start MTFG_ Button (5). On slow computers, the program may take several seconds to start!. Before you press the _Start MTFG_ Button you have to open a video in OFS else you get only the Message Box "Video file was not specified!".
+11. Download the [lua json extension](https://raw.githubusercontent.com/michael-mueller-git/Python-Funscript-Editor/main/contrib/Installer/assets/json.lua). Open the URL in your Browser and press `CTRL+S`. Then save the file as `json.lua` to the Directory `%APPDATA%\OFS\OFS_data\extension\Funscript Generator Windows`.
+12. Open OFS, activate the extension (3) and enable the window (4). Now you can use the extension at any position in the Video with the _Start MTFG_ Button (5). On slow computers, the program may take several seconds to start!. Before you press the _Start MTFG_ Button you have to open a video in OFS else you get only the Message Box "Video file was not specified!".
     <br> ![Activate MTFG Extension](./images/ofs_extension_03.jpg)
 
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