It seems to have lost the abality to do simple math, for example if I had a dimension of 22mm and I need to add a little, it used to be I could just type 22mm + 0.002"  and it do the unit conversion and math.  Now it just ignores the added +.002" that I typed and keeps the original value with no notification that anything is wrong.  Is there any way to get back to the original behavior? I've already made a couple mistakes because of this and it is very inconvienient dragging out the calcualtor for this sort of thing.