I have started years ago with the not recommended practice to put in every unknown date "unknown". Now, 13,000 records later I would like to get rid of the "unknown" dates and set them to empty (or delete all unknown dates)
I tried search & replace and edit facts, but without success. A full FTM compliant ASCII export/import format would also be of help, I could do the changes in an editor, but exporting to gedcom can't be re-imported without loss of all picture links and the FTM export formats can't be edited.
Is there any workaround I didn't see yet?
Thanks for any hints