Kopia UI - Managing Repositories

If I understand your question correctly, then yes, the GUI allows you to easily toggle through different repos. All repos you are connected to are shown when you right-click the tray icon.

Yes, if I use the regular GUI with tray icons then okay, but what about the web UI provided by a headless server?

You can start multiple server instances, one for each repository. Would this work?

Currently server and the UI is not multi-“tenant” for lack of a better word, it’s unlikely to change soon, but it’s not fundamentally impossible - just a huge change.

+1 I think this is the better option.

Can I rename a repository-TIMESTAMP.config file to repository.config to make it the default repository?

What is the purpose of the .config.mlock files? Can they safely be deleted?