I've been using GIMP to do sprite work for Transport Tycoon, and everything was working fine last night when I finished up with a new sprite and exported it to PNG.

Today I get on my computer and now I can't do much of anything with GIMP.

I've tried everything I know on new images (made new in GIMP) or old images I previously worked on and nothing works.

I tried drawing with the brush or pencil, nothing happens.

I try to select an area and I can't cut or copy the area, and if I try to paste something it just pastes nothing/invisible things.

I'f I select an area to delete/clear, when I hit "Clear selection" or the DELETE key, the whole layer gets deleted, even if I only selected a pixel.

All this happens whether I'm in RGB or Indexed color mode, on a old layer or a new layer, and Reinstalling GIMP did nothing either.

Just to make sure I'm not going crazy or my keyboard or mouse is being weird, I tried SAI, MS Paint and Paint.net to see if I can draw, cut, delete, etc and everything works in other image editing software, jut not in GIMP.

I'm Running GIMP 2.8.18 x64 on Windows 10 Pro x64 (Build 14393)

Oh and I should mention I already tried uninstalling and reinstalling GIMP, that didn't solve the issue.

neither did restarting my computer help, After two restarts GIMP still isn't letting me do anything.

If I have to guess, your personal GIMP folder is corrupt. Delete or move it
somewhere and restart GIMP.

Your personal folder is located at C:\Users\YourUserName\AppData\Roaming\GIMP\2.8 or it's C:\Users\YourUserName\.gimp-2.8

I went and reset my tool preferances and that seems to have fixed my problem. Now I can draw, cut, paste, and delete again.