well I tried to get this to work but no go. Downloaded and registered as I had version 3.94 and it worked great, but if an upgrade come out then you go for it. Every time I logged in I could only get into one room then it would come up with an error, and report back to Microsoft and close. Tried numerous install and uninstalls, tried helpdesk but could not get it to function, so went back to previous version, at least I have no problems with it. Pity because the added features . 4.0 make it worthwhile having when it works on all systems