hey, i just updated my pc from windows 8.1 to windows 10,
however i forgot i had some custom theme installed that made my windows & notepads black/grey.

by now i deleted the theme from the folders, but my pc seems to be stuck with it, and when i try to enter the theme settings (rightclick desktop, preferences, themes, ..)
this is where i get stuck and the window closes itself.

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if i click the first option, which translates roughly to theme settings, the window just closes itself.
is there any way i can force windows 10 to use the default theme, or is there any other solution?

thanks in advance.