I'm somewhat surprised that you had to repurchase Poser 11 when your old serial number should be in Bondware's databanks making you eligible for free upgrade/updates.  Pro has been officially dropped from the name, and all varying versions have been integrated into one.  RedPhantom has posted the link to access the latest update(s).  I don't know which version you downloaded from Renderosity but the last, current version is 11.3.818.  I am assuming that this is the version that is available for download.