I had the same issue on my win7, do the a.exe trick as mentioned by fruitbat and DD_crash.
Personally I've been a long time user of UP3 and find Zuti MDS the biggest asset so far but after having a pause (need to nurse the Dover/BMS/DCS and Arma installs on my computard

) I'm looking into 46 again and will problably go HSFX due to the latest TD stuff such as AI improvments as said earlier.
On a sidenote, Bearcat - that was one of the best descriptions I've read in a long time. Short and precise for a rather big picture, should be in a pop-up for people opening this forum first time

. I raise a beer to you.