i was running ver 4.07 with windows xp service pack 1 and it had a cpdn unit and a bunch of s@h units on it. then i tried to use 4.08 and it didnt recognize my other units and loaded another cpdn unit and tried to get a bunch of S@H ones. it also became non responsive when ever you clicked a tab and it also started slowing down my computer horrendously. i degraded but in this case it was more of an upgrade to 4.07 again. i still have to get new wus though. is there anyway to get it to recognise the old wus since they are still on the machine in the projects folder. i had about 40 hrs into my cpdn unit.