@ralledk I believe we were talking on email? I'll answer here anyways, so others can see.
Try using the command ".setbind gui".
If you get an error that says "could not find mod gui", this may mean you're trying to load the donor client with a non-donor account.
If it says "unknown command at position 0:" then Aristois isn't loaded, and you need to delete libraries/EMC, net, and me.
If it works correctly, but pressing the new key doesn't open the menu: If you are on 1.14, this is a bug with the gui. Use 1.14.1, 1.14.2, 1.14.3, or 1.14.4 instead.
If none of the above works or your issue is different, a staff member will need to take a look