Properties Dialog Box Not Coming Up

When I left-click on an entity after activating the properties command, no dialog box comes up. It worked when I first installed it but not any longer. I did a reinstall and it still doesn't work. Any insights would be great.

If something is screwed up it might help to do Options - Application Preferences - Defaults - Clear Settings -All.
Or you have to delete the entries for LibreCAD in the Windows registry, as these are kept when reinstalling.

Or simply mistaken Attributes for Properties?

Clearing the settings did it, thanks for the help. I'll set things back one-by-one to where I had them and let you know which setting causes the issue if it occurs again.