,
1. How do I change that BLACK background to use the same wallpaper as the desktop wallpaper
there's no option for that.
2. How do I remove the win 10 setting windows(the gear Icons windows) that appear only when on the Fullscreen
That's a Dexpot compatibility issue with Windows 10. Please try disabling the Windows SuperFetch feature.
3. Dexpot offset my wallpaper - kind of crop the picture (see the 2 images below) for comparison
This is also a compatibility issue, see above.
4. Lastly, windows start menus doesn't work on some Dexpot. only one out of all
Please use the attached mywechsel.ini-file and copy it to the Dexpot main program folder: