I'm using two accounts on my computer, one is personal, the other one for work. I have greeshot installed on both of them, but it only works on one of these accounts. Unfortunately it doesn't work on the one where I need it most – the app won't react to the printscreen button. I have no idea how to set it up, I've read here that office OneNote or Dropbox might be blocking it, I believe it's not my case. I also turned off the option to use the custom printscreen app from Windows 10 with the PrtSc button.
So I'm trying to uninstall Greenshot, so I can try to set it up once again, but it always tells me the app is already running. So now I cannot use it and I cannot uninstall it either.