Aha! I had to reinstall the Poser Support .exe and give it permission to put stuff on the C drive. I normally install programs to a separate SSD and keep C for Windblows only. This version of Poser doesn't seem to like that and insists on installing stuff to a default area. During my initial install I probably didn't bother. Going to dive in and play with some dependent parameters, assuming PP11 doesn't crash every five seconds. Thanks for your help.