I absolutely don't.
And by the way your worded that, I'm guessing it's a one-way trip if I do something I shouldn't.
Perhaps I should get into contact with the original developers or the new team? I know the project has been discontinued but would a "patch" or a small update to adjust it be really that troublesome to create? On StackExchange some people asked the original team to get around it but I guess they never worked it out in the final updates.
Honestly, I doubt they'll do anything... but you can try... one last thought:
Have you simply tried restoring your wallet using your backup "wallet words"? I would assume that as those labels are not stored anywhere other than your wallet file, that if you restore, it won't find those labels... and the new version of your wallet will just have the addresses.......... in theory
Also, it isn't exactly a "one-way trip"... providing you take full backups of the files and have your wallet words etc. It just isn't an "open a text file and change some text and click save" type of adventure.