Currently having the same problem. Bought poser11 as a digital download recently. It all worked fine for a while as I tried to get used to superfly renders. Finally started making a scene then it crashed.

Now every time I try to open it, the executable works for a second, then nothing.

I've uninstalled, reinstalled.

Wiped it all and redownloaded.

Still nothing. Only get the serial number for download manager and that's it. Theres probably something I've missed.

I've also still got poser 10 installed, so short of wiping that incase it also effects Poser 11, any other ideas? Cheers.