Having issues with the emulator after playing a while

[SyZyGy]

    So I've been using PPSSPP for about a month and it's great, but I'm starting to have issues and I'm not sure what to do

I'm playing Tactics Ogre, and I use all 5 save states. A week or so ago I was randomly hitting F1-F12 keys to see what they did because I noticed that one turned sound on, one did a screenshot, one changed to a different state, etc. When something was turned on from off I turned it back on, and when something was turned off from on I turned it back off. But there was frame skipping or something that I couldn't remember the default, and I don't know if that's the issue, but I started getting weird horizontal lines during certain spell animations and on the menu. I lived with it, but now today I tried to figure out what it was and saw something about scanning (CRT), so I checked that. Now there's a green filter everywhere in addition to the lines:



   

When I try to turn it off, nothing happens, it just stays on.

Do I need to reinstall PPSSPP? Or update it? What happens to my save files in my games if I do this? Does anybody know what the issue is?

Thanks