I don’t have immediate access to a Mac to conform, but I suspect this is correct / expected behavior due to how Duplicati does the in-GUI updates using the ~/.config/Duplicati/updates folder (for more detail, see “How Duplicati installs / updates work” @ Downgrading / reverting to a lower version).
If you go to the main menu “About” → “System info” page you should see both a ServerVersionName (most recent update being run) as well as a BaseVersionName (INSTALLED version not including any GUI updates).
Hopefully somebody else can check for the Mac reported !LONG_VERSION! version number before I can do it 4 or 5 days from now. But until then, can you confirm:
- your screenshot is for Duplicati.app v2.0.3.6 canary
- what version of MacOS are you running