1) All of our evaluation software is full featured and only limited by the 14 day trial license.
2) The Pragma Systems SSH Client for Windows supports VT100 to VT420, WYSE 50, IBM 3151, ANSI and our own proprietary WindowsTerm when connecting Pragma client to Pragma server. xterm is compatible with VT420 and so using VT420 should work if you are connecting to a UNIX system.
Is there a feature you are looking for specifically within xterm? If so, let us know and we can look to provide the support.