I didn’t got any update notification and therefore I decided to manually install from v.0.11.13 to the latest beta v.0.12.3. The installer noticed that a current instance of Obsidian was running and the installer closed it. After the installation the new instance missed many settings. Only my Obsidian acount was still available. But the vault, sync, templates, … was missing.
The installer shouldn’t delete / ignore current settings.