Units and Dimstyle not being saved with drawing

I was creating an architectural drawing and set units to inches

and dimstyle to architectural.

 

After saving then reloading the drawing, the units default to

unitless, and the dimstyle default to decimal.

 

Also, my old templates for "inches" no longer work

(that is the program will crash), I just upgraded to 1R31

and this is when all thes issues came to be.

 

Basic functionality has gone away!