We are currently half 4.2.3c and half 4.4.7, and I recently found out that 4.5.1 is able to compress and acelerate ICA(citrix). So my question is what is the best path to get our entire envirement to 4.5.1?? It looks like we cannot go from 4.4.7 to 4.5.1. Should we downgrade back to 4.2.3c and then go to 4.5.1??