I am a genealogist who received a phone call from a man who has been using GRAMPS since at least 2018. He cannot upload his current GPKG file into the latest version of GRAMPS. How are GRAMPS users uploading files. I have no familiarity with GRAMPS, so do they still use GPKG files? I am familiar with GEDCOM’s but it looks like GRAMPS does not use them. Any help is much appreciated!