I went from Poser 7 to PP2010 and at first I hated it...had to wrestle my mind around all the new stuff...but it was worth it. There's a big jump you have to make but it will be worth it. 

The x86 is the 32 bit version. The other will be the 64 bit, which you should use.

Persevere, and relax. It will be worth it. 

Poser Pro 2014

My personal website: Novels, photos, video, sculptures and more
Evidence of a Lost City: An animated movie and novel, in progress
Hag: A novel and live-action movie