'CTRL-ALT-T' not working in Lubuntu 18.04

I'm new to Linux, ubuntu, and lubuntu so this might be an easy fix. Today I installed Lubuntu 18.04 and suddenly after a reboot the lxterminal won't launch via 'CTRL-ALT-T' anymore. It still works perfectly fine after launching through run or the menu. The shortcut simply doesn't work anymore. I think it broke because I was messing around in 'default applications for lxsession'. I changed around some default programs, such as VLC. I don't think I changed the 'Terminal manager' launch application but even if I did, I'm pretty sure I've reset it to what it was before (lxterminal &) and it still isn't working. Any help would be greatly appreciated.