Is your feature request related to a problem? Please describe.
Sometimes compiler specific functions aren't recognised by default and don't always appear in some work. When you find them it would help if we could add them individually to a pre-existing fidb file. Currently the only option appears to be to Populate FidDb from programs... which seems to take everything!

Describe the solution you'd like
Have the facility to add individual functions to a pre-existing FidDb.

Describe alternatives you've considered
Allow all functions you've successfully analysed to be added, but that corrupts the purity of that particular FidDb file. (I don't see a facility to remove unwanted additions!)