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Bridgeport came with the Late Night expansion, which you already have. The disappearing custom content isn't a new issue (you'll notice it if you google it). I suggest you follow the Crincrict's suggestion above link and do a new content install to an empty launcher.
If you have player made custom content in the launcher, remember that those can also screw it up and bad ones do make game crash. I would especially avoid downloading anything from the Exchange. That is why I also prefer using package files over sims3packs: they're easier to organize, find and remove if necessary.