Thank you for the reply.
I usually don’t mess with default configs unless there is a problem or I want to change it on my own. And other than there was a problem with $PATH at some time, I didn’t make any changes.
When I check default file associations from Thunar, they seem all fine.
By the way I fixed the Steam issue with removing
Mime Cache. But Micro issue is still there. I noticed that when I right-click and choose Open Terminal here it says
Failed to launch preferred application for category "TerminalEmulator".
Could not find fallback TerminalEmulator application.
I think there is some issue with $TERMINAL but don’t know where to change that. I already changed default terminal in
urxvt thinking it could be about
sterminal but it seems that was not it.