I bought WW2 when it was first releasd together with V4 addon. I unzipped V4 addon into Poser 8 WW data folder. It's possible that it's an older WW1 version  - do I need to download the latest version of V4 dat file??

MS Windows 7 Home Premium 64-bit SP1
Intel Core i7-2600 CPU @ 3.40GHz, 12.0GB RAM, AMD Radeon HD 7770

PoserPro 2012 (SR1) - Units: Metres , Corel PSP X4 and PSE 9