I had this same problem and nearly had a stroke...no more QSuite!!!??
I would start QSuite and you could see it come up in the task list. After the little warning screen, I would click OK and then about 5 seconds later QSuite.exe would disappear from the task list. I rebooted, uninstalled, rebooted, reinstalled, rebooted, tried again....no joy!
After about 2 days of troubleshooting here's what I found out: With more than 6 virtual drives in Alcohol 120% (v126.96.36.19923), QSuite will not open. Works with 6 or less, doesn't work with 7 or more. I also tried adding and subtracting real drives. I thought maybe it my be the total number of drives. No difference.