Saved documents are blank when opened.

I'm running LibreCad version 2.1.3 on Windows 10.

When I save a document as a dxf and close LibreCad, then attempt to open the file later, the file is always blank. I lost some work that I did because of this, and now I've done numerous tests by opening a new file, drawing a few lines and saving. Every time when I reopen the file it is blank. Using select all doesn't find anything.

I'd love to use this program more but if I can't save then this ain't gonna work. What am I doing wrong?

Can you attach the file you're having problems with so we can take a look?  The Upload File command is in the "More" menu above.