I had a problem installing as well, but I got it to work. I had to install the version I bought at renderosity. Then I tried to go to 1.5 and it said the correct file wasn't found. I then installed the upgrade to 1.1 that I got at DAZ. I tried to install again. Said the correct file wasn't found. I gave up and was going to contact DAZ. But I rebooted and tried again and that time it found the file. I guess after I tried to run it the first time and it didn't find the correct file, it kept something in memory that told it not to continue, but when I rebooted, something got flushed.