I don't know the answer, but I haven't seen the files like the ones you talk about in DBPro. I recall you got an intermediary compiler file with all of the source amalgamated in the one file.
Thinking ahead, put your files in a Box or Dropbox folder, then it is always backed up.
Dropbox is better for code, because you can see up to 50 previous versions. Box charge extra for this ability.
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Quidquid latine dictum sit, altum sonatur
TutCity is being rebuilt