I installed Manjaro a few weeks ago on my laptop, and I noticed that any time I double-click a text file in Dolphin, it tries to open it in the “Software Installer” application. This happens for everything I haven’t manually associated with something else.
Is there any way to change this globally? Currently, it seems like my only option is to manually change the file associations for everything one by one (in System Settings->Applications->File Associations).
I would much rather have something like Kate be the default for all text files.
The file ~/.local/share/applications/mimeinfo.cache doesn’t exist.
It looks like that file includes the manual file associations I created in the system settings app. Deleting that file and relaunching dolphin seems to have made everything sane again; text files open in Kate, PDFs open in Okular, etc.