I've finished all the Palapeli default puzzles (they're easy!) and don't want them in my collection any more, but even when I delete them from ~/.local/share/palapeli/collection they reappear there as soon as I start the program again! Is there a way to get rid of them altogether and only have the puzzles in my collection that I want there?

(ETA: I found the palapeli-collectionrc in ~/.config; setting ModifyProtection to "false" doesn't make a difference, and deleting the default puzzles from the rc file or moving it out of the way altogether just generates a new rc with the default puzzles in it.)