can't use double click in kde

[allaf]

I think user settings for file associations are stored in ~/.local/share/applications/mimeapps.list (or ~/.config/mimeapps.list, see EDIT), but rather than editing that file I'd probably try to use the command xdg-mime (see 'man xdg-mime' for details) to set a file association to see if that works (and if it doesn't, there might be a relevant error message that might point to the problem).

EDIT: Actually, it seems mimeapps.list could also be in ~/.config/ and ~/.local/share/ location is deprecated (which could be part of the problem) [https://wiki.archlinux.org/index.php...t_applications]

Do you have mimeapps.list in either location and do they change when you edit file associations in kde?

I had 3 different locations !
/home/user/.config/mimeapps.list
/home/user/.kde/share/config/mimeapps.list
/home/user/.local/share/applications/mimeapps.list

I manually deleted the bad entry in /home/user/.config/mimeapps.list and /home/user/.kde/share/config/mimeapps.list and I fixed it.

Thanks a lot !