P11 is not backward compatible.. P10 crashes every time I attempt to open a PZ3 saved in P11. Smith-Micro really fricked up my Poser installations. Luckily I have P10 on one computer and P11 on another. P10 was on my two computers, but the one with P11, messed up P10. Running P10 on the same one as P11 causes it to open without the Content Library. I get a blank white box and It says I need Adobe Flash... I've reinstalled Flash, without success. Reinstalled P10 without success. I've never had a Poser crash in 15 years.. I started with version 4, going through 5, 6, 7, 9 & 10... Never a crash. Now with P11, it is totally hosed. I'm not tech minded, at least not anymore. .. just an artist. Any help would be most appreciated. Thanks!