Thank you for your suggestions, i tried them both. Altough the scannow command did do something, it didn't solve my problem.I don't know what is wrong, but maybe this is a windows problem. Search in your C: for any ApkSpy temporary file or dir and delete it. Or maybe do a scan with system tool; write on command prompt (launch as administrator): sfc /scannow
Anyway, I think it's best for me to do a clean install of windows, because APKspy did work previously, but it would've been nice if there was an easier solution.
But thanks anyway