I had Ctrl-Z assigned to Undo.

This worked great! I found at the end of the exported key mapping these two lines:

[KeyPrefix#2]
Prefix=Ctrl+Z

I.e., these lines were created after I used Ctrl-Z as a prefix but weren't deleted after I got rid all Ctrl-Z prefix assignments. -- might be a handy thing ...

I'm evaluating Zeus so I don't know if that precludes me from getting support.

I've been setting up my own custom keyboard mapping. I accidentally used Ctrl-Z as a prefix key (I meant to use Esc). I removed the key combination. But now when I press Ctrl-Z it does nothing (acting as if it is a ...