EDIT: I reinstalled it with a snap (GitHub - MrCarroll/joplin-desktop-snap) and it is working again!
My Joplin does not start normally or not at all since this morning. This may be due to a Linux Manjaro update. I only get the menu but it is almost inactive. It is an AppImage installation. How to uninstall it? Do I have to reinstall it from the repositories? My app on Android is working normally and Dropbox as well, I guess.
Thank you for your help