recovering 'hidden' custom meta-data (Scriv 1.9)?

I changed the settings on custom metadata (number of fields, name of fields) in a project without taking due caution and now I have a handful of files where the inspector shows the little asterisk that says there’s custom meta-data entered, but I can’t see it, I’m guessing because the program is confused on which field it goes with due to me changing too many things.

Is there any way to find that ‘hidden’ meta-data? The easiest seems to be putting the settings back to what they were but I can’t remember for the life of me what that was.

note: I’m running scrivener for windows 1.9 version under WINE, as my OS is linux.