Hmm, strange indeed - I wonder when they stopped working. hmm, and why is "Cut" in the menu, that is never going to make sense,, I'll have a look when I find a few hours (which is probably not this week, but I can always hope).
There is a workaround you can use in the meantime though - each time you import a modification you get a copy. So export your "template", then you can simply import it each time you want to create a new callsign. EditVoicepack will remember the folder you import from, so it should be quite fast - almost as fast as copy paste.
There are a few tutorials on using EditVoicepack here:http://editvoicepack.com/tutorials/
If you have suggestions for other topics, please let me know. I am already aware I need a tutorial for creating phraseology modifications - but this is the most advanced topic in EditVoicepack, so it will take me some time.
I used to have a users guide that listed ever single button and menu entry back in EditVoicepack 3, but it generated a lot of support questions - so I prefer to spend the time I do have available to improve the documentation on creating more tutorials.