CheSter, you should just be able to copy and paste with the keyboard shortcuts ctrl-c and ctrl-v. That's how I've been doing it.

If the key is wrong, we display a red exclamation mark instead of a valid character in the list (eventually, we will have more informative error messages). If you don't see that, there might be a different problem.

The output from running mevemon in the terminal ( # /usr/bin/mevemon ) may be give some info for me to try to track down what the problem is.