The only way I could get it to work, after some HD jiggling, was to install the released-in-error 1.5 update, then run the real one. Something is screwy, but I've no idea how you will get around it since you don't (I assume) have the earlier, unintentional patch. Try emailing DAZ technical support, if they have any attention to spare from D|S, and let us know if they have a solution. As far as I recall I didn't have this problem when I first installed the update.