I am getting very frustrated the last couple of days as I am working on a set of architectural drawings and I now have made the same changes and updates twice and they did not save so I have about 4 hours of lost work on this drawing set. I re-organized the file directory before the lost changes occurred do you suppose that might have something to do with it. I have stopped and went to "file"- "save" numerous time through progress and before closing.
Before starting the third time that long job, I'd suggest drawing some very simple sketch, save it. Check carefully where will you save your file, and name it so you can find it, for example include date in the name.
Can you open this file? Close LibreCad, try opening it again.
If this test goes through, proceed, If not, then we have to trouble shoot what is your problem.