Oh no, I certainly wouldn't ask for a refund over something like that.
Even the free version of the frontend is great so I don't feel like I've lost out or anything.
Being that the licence xml still contains my full name and personal email I thought that would be enough to deter me and others from sharing the software, but I can understand that you're pretty adamant about this point and I can respect that.
I did manage to find a workaround to get it how I wanted using the custom filters however.
I used the "status" in place of how complete the game currently is.
This lets me create custom filters for "100%, backlog, complete, currently completing, want to 100%" and I can batch edit games to adhere to this which is great.
Of course I have to erase "imported from steam, imported rom" to do this, so the proposed playlist feature should be even better for this purpose, especially if you can put a "add to playlist [X]" in the right-click context menu (much like in a music player).
Thanks for the reply