You should mention which version(s) of Windows and LibreCad you are using.
Check:
* settings in: C:\Users\
User\AppData\Roaming\LibreCAD
* Application-preferences directories:
https://librecad.readthedocs.io/en/latest/getstart/configure.html#application-preferences (maybe under C:\Program Files (x86)\LibreCAD)
You might prefer a PortableApp version:
*
https://portableapps.com/apps/graphics_pictures/librecad-portable*
https://portableapps.com/node/61725