I cannot type a foot and inch dimension in the dimension box. For example, if I put 7' 8" it makes the dimension 7". I can make the dimension 7' then go back and add 8 to it. If I only single click on a dimension and get the little white box, putting in 7' 8" gives me an error. "Please enter a number greater than or equal to 0 and less than or equal to 39370.07874016."

I tried a simple equation 7' + 7' and I get the same results in both boxes.

Something is wrong with its ability to perform equations