DraftSight crashed and I restarted it and it seemed fine  After a while, I couldn't draw anything or do any trims.  I can select something and delete it.  The command window gives the command to draw, but when I click and move the curser, no line appears.  This is not unique to one drawing; it happens on all drawings.  I have tried restarting the program and then rebooting the computer with no success.  I also tried going back to default settings with no success.  What else can I try before reloading the software?