Skimming docs at https://shinnok.com/rants/2016/02/19/using-tarsnap-gui-on-os-x/ , you might have fallen through the cracks of their UI support. I'm more familiar with the command-line interface than the third-party GUI that runs on top of it.
For the CLI, I would setup the config and run tarsnap --fsck to update the workstation state from the backups.
I think you can then set the GUI to use the config and cache folders that the CLI uses. The tarsnap.db you mentioned is only for the GUI app configuration; I don't know how much or how well that will carry over from your work workstation to your personal workstation.
Sent from my iPad
On Apr 9, 2021, at 10:22 PM, Amar via tarsnap-users <firstname.lastname@example.org> wrote: