Hi, I have downloaded Tutanota AppImage and run it from terminal, it asked for desktop integration like @vgaetera said, and it created ~/.local/share/applications/appimagekit-tutanota-desktop.desktop
file when I clicked yes. Here is its content:
[Desktop Entry]
Name=Tutanota Desktop
Comment=The desktop client for Tutanota, the secure e-mail service.
Exec="/home/oguz/downloads/tutanota-desktop-linux.AppImage" %U
Terminal=false
Type=Application
Icon=appimagekit-tutanota-desktop
StartupWMClass=tutanota-desktop
X-AppImage-Version=3.48.6.308
MimeType=x-scheme-handler/mailto;
Categories=Network;
X-AppImage-BuildId=1IfkWtslCAnVpshAaQC8gUHWugV
X-Desktop-File-Install-Version=0.26
X-AppImage-Comment=Generated by /tmp/.mount_tutanowJ17MH/AppRun
TryExec=/home/oguz/downloads/tutanota-desktop-linux.AppImage
Then I deleted it and run it from terminal, it asked for desktop integration and created desktop file again. But since it is located in user’s home directory, a system upgrade shouldn’t delete them. Are you sure you don’t have them in the ~/.local/share/applications
directory?