I've been able to solve the lights problem by using the "reset lights" utility available in the free section. It's an extra step, but if you use it every time you you change lights you should not have any "hangs" due to lights. With the textures, what I've discovered is that if you walk away and let Poser search and think about it, eventually it will give up and let you select a different texture. Depends on how much patience you have :)