Huh... never seen before. Can you shutdown and reopen SW if you still see the same thing ?
I just restarted and the problem remains...
I am able to change layer style and thickness.
Try resetting the SOLIDWORKS registry
Welcome to the forum. That is odd. You don't have the "Print / No Print" option either. I'd suggest contacting your VAR, but it might require reinstalling SW.
Retrieving data ...