I'm trying to open a .gpkg file made on Gramps 3.4.2-1 (Windows 8) but it's a not working.
A kind soul from another world sent me some links to read and apparently others are experiencing the same problem. The Gramps portable would be great BUT only if creating and reloading backups isn't an impossible feat so I'm hoping there is some way to either
* use the command line to force the .gpkg to open (so I can at least save as XML or something), or
* use some 3rd party app to extract whatever files are in the .gpkg.