Fix for Dolphin in KDE/Plasma when it doesn’t save „Filetype options“

Since a KDE/Plasma 5.x update a long time ago I had the problem that changing „File type options“ (what program is used to open a specific file type) in Dolphin didn’t work anymore.

I could change everything but the moment I closed and opened the „File type options“ properties again it was reset to default.

In my case there were many different entries for the same file type in ~/.config/mimeapps.list. The changed settings were saved properly from within Dolphin but probably not read correctly.

I removed the file ~/.config/mimeapps.list and then changed one entry for file type options in Dolphin to create a new one. This fixed it.

Note that after this you need to set the default applications in „Systemsettings“ -> „Personalization“ -> „Applications“.

Instead of removing the file you may also delete the specific entries you want to change permanently.

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