I changed jobs recently and got a new machine. I need to get a new copy of Mathcad and am not sure which to get. I downloaded a trial version of Prime. The problem I immediately have is that I cannot copy/paste to MS word. This is a standard MO for how I use the tool. Does this mean I need to go with 15 or is there something I don't now about how to work with word?
If you buy a copy of Prime you get a version of 15 with it, and vice versa. Currently, Prime is very limited in it's capabilities, so I would recommend any experienced Mathcad user to use version 15.
I recommend to you to work in the last stable release - Mathcad 15 M010. Link to trial version of Mathcad 15: http://www.ptc.com/products/mathcad/mathcad-15-0/free-trial.htm