The cigen.package contain all the thumbnails that are created on the fly ,when you are using Bodyshop ,,,
it's the other files with name bodyshop registry that you MUST get rid of.

IF YOU WANT TO BE ABLE TO USE BODYSHOP AGAIN ! DELETE THE FILES CONTAINING THE NAME ""BODYSHOP ~ REGISTRY" or what ever its call !

problem solve.

ps:If don't know me and never eared of BobbyTH aka BobbyTheHacker, then don't listen to me! I'm only trying to help here.

Sometimes, it can take a while for bodyshop to open after you've deleted the various .cache files. Have you tried opening it and leaving it alone to load for a while?

Also, have you tried deleting the cigen.package  and content registry files (if present)? All the cache files (in case you didn't know) are groups.cache, cigen.package, content registry and accessory.cache

Another possibility. If you have ever made any clothing/hair/accessory/etc recolours, then the contents of your projects folder can cause issue. Those are no longer needed once they've been imported into the game, so clearing that out can help a great deal.

Something else I've just thought of: it could something in your saved sims folder, so if the above doesn't work, try pulling the Saved Sims folder out. If this does the trick, then you have a bad sim.

Caches files are always kill on sight, having read many other posts about it. I have no saved sims, and have cleared out custom content. No luck at all. On the other hand, the program starts and blinks out of existence in my processes list! So I highly doubt waiting for it to come alive would work.