Plugun tab not available in Preferences
I want to install a new plugin in my musescore 2.3.2. It says that in mscore 2 you have to set something in the preferences tab for Plugins.
However, in my Preferences menu the tag Plugins is missing. I have 7 tabs (General, Canvas, Note Input, Score, I/O. Import, Export, Shortcuts). Can anybody tell me what's wrong? I would like to use the fixfingering plugin and I have loaded it in the plugin directory (In my system/home/joep/Documents/Musescore2/Plugins but it doesn't show in the plugin directory which has the standard plugins.
However, the location of these plugins is in a completely different place, moreover the directories written in the preferences tab "General" doesn'y make sense as there are directories mentioned that do not exist, however, the scores are written in the correct directory.
My OS is Xubuntu 18.04 (and therefore Linux!).
Another technical point is that I have it installed using snap (which I don't understand as I'm an old unix programmer and haven't kept up with all the changes made to Linux).
Hopefully someone can clarify these points for me.