To turn the Zoom Hud on, go to the Auto Import tab and, with Auto Import off, click PokerStars on the left and then on the PokerStars Configuration tab on the right. Scroll down to the bottom of that area and check the "Enable Zoom HUD" box. Then the next time you start auto importing for PokerStars, the Zoom HUD should function.
The development team are working on the issue with the Zoom HUD after the PokerStars update - please bear with us, we'll get a fix out as soon as possible.
Let's keep your issue to the other thread - we'll work it out, but splitting the information between two locations is just going to get confusing for us.