Why in the world is it crashing my game when I click on it? I don't understand. It's from sims3 exchange.

This probably belongs in this section http://www.modthesims.info/forumdisplay.php?f=551 and more info from you would definitely help anyone to help you ( it crashes in game when you click on it or it crashes in the buy/build catalog? That kind of info and more is needed) As a side note, the exchange might have some great items, coasterboi's worlds come to mind , but anyone can basically upload anything to it. No safety checks, no quality control etc... for the most part I avoid it at all cost. Furniture needed to be updated for the Pets EP, I have no idea what happens if it wasn't updated, just the first thing that came to mind.

Ditch the furniture, that's what I would do. I even trust people with their own blog more then the exchange.

^ Which is funnier than hell considering you have all kinds of stuff ( and working, good quality stuff I'd like to add , thank you! ) uploaded to the exchange yourself. It's like a used car salesman telling a potential customer " Dude, dude, go down the street to Fred's Automotive you're way less likely to get a lemon there" And ya, despite quality contributors there such as yourself, it's about the last place I ever look for anything.