For some reason, I can't edit my menus on MATE. Alacarte, the program used for this, worked fine on Debian Jessie but not on Arch. Here's what I'm trying to do, you can see that the "OK" option is grayed out:
https://i.imgur.com/IQpgif4.png
What could cause this?
Root permissions doesn't help.
EDIT: Solved. Mozo did it.