Hi,
I accidentally set a rule on kde 'discover' app which lead to loosing the window manager (can't access minimize,maximize etc...).
Googling I found
System Settings -> Window Management -> Windows Rule and delete everything but still can't restore .

I can't recall if I right clicked on "special window settings" or "special application settings". Is there a difference ? Meaning 'app rules' are located somewhere different than 'window rule' ?

I managed to create another rule for the same app and reset the settings
Still it would be nice to manually edit the config files

hi, can you explain how you reset the "special windows settings" of the given application? or did you ever find the config file?

I'm asking this because I was tweaking htop windows settings and I chose to "force minimize", now I can't MAXIMIZE htop!!! it remains minimized forever!!!