Personally I think there should be a re-generate button such as in RB. Would alleviate accidental re-generation in BIAB, and possibly an undo function so that once you intentionally re-generate, if you decide you don't like it, just undo it to revert back to the last settings before you save the file.

Not sure how difficult this would be to implement, but for my simplist thought process, sounds like it would solve some issues.

toucher