Posted by dellus on Dec 30, 2020; 2:03pm
URL: https://forum.librecad.org/Reset-Librecad-installation-tp5719956p5719957.html

If the menues are not completely lost, you may try Options - Application Preferences - Defaults - Clear Settings - Layout or even All.
If this doesn't help you have to wait until someone else gives an answer, I don't know where those parameters are written in Linux. LordOfBikes once has told this here for a similar case, you might search for it.