I found my Innkeeper in C:\Users\%user%\AppData\Local\Innkeeper. This folder takes up over 300 MB on my disk though. Can I safely delete any of this stuff?
Yes, that is where Inkeeper installs. So if you want to remove it, feel free to delete the folder. If you want to keep it and just minimize the size, i believe you can delete the patch folders with the numbers smaller than the biggest one, ie app-0.4.25 and keep app-0.4.30.
Good on you to search for answers first, but when a topic is this old, better to start a new thread next time ;-)