Custom keyboard shortcut to launch guake not working after upgrade from 0.4.4 to 0.8.3 (shift+alt+t)

I had a custom shortcut of `shift+alt+t` to launch Guake in 0.4.4. And just upgraded to 0.8.3 and the shortcut doesn't work anymore.

I am on Ubuntu 14.04 and using the webupd PPA. I completely uninstalled with a `apt-get purge guake` too but no luck.

I was however to get a ctrl+` shortcut working though, but really want my old shortcut back.