I was trying to change the default apps for file types, but it didn't work (I tried for PDFs and videos). It didn't change the default program, it stayed the same.
I used this method:
Right click -> Properties -> Open with -> [select app] -> Set as default
I tried doing it as root (using Nautilus through the terminal), but nothing.
I recently installed Debian and I'm having the same issue.
~/.config/mimeapps.list
- Please check that it exists and that you have write perm on itchown $USER:$USER ~/.config/mimeapps.list; chmod 644 ~/.config/mimeapps.list
– cmak.fr Mar 04 '19 at 11:27