Once you get to the final install screen, read it carefully. Pressing F8 is the proper response to continue. You'll then have to reboot to have these changes take effect. It comes on a separate disk with its own install routine that installs to the directory of your choice. There's also extensive online context sensitive help available from just about everywhere in the program.
Noticeable improvements are the spell checker and message editing functions.
However, one of the first things you'll notice about MTF is the new look, including mouse capability. Using a mouse makes maneuvering within the program much easier. The other two options of selecting buttons or fields are the tab key and the hot key method. You'll notice on most screens that there are single letters highlighted within the titles of fields or buttons. To select that operation or field, press the ALT key and the highlighted letter at the same time.