Basically I wanted to open Minecraft with 32bit Java because the scren recorder I use does not support 64bit Java and that's what my pc runs Minecraft with by default, but I accidentally kept the box checked which now trys to open all my games with 32bit Java and that doesn't work. Any help will be much, much appreciated!
More about :accidentally changed default program games java fix
'Can you use system restore to go back to before you made the change?
Go to control panel/system/select system protection, system restore' I've tried this but I hadn't installed anything recently enough to set it back