I thought I’d post a little guide to removing messed up content that was installed along with something else accidentally. There were a few files in my game that weren’t package files, and I hadn’t installed them as .sims3packs either.
With Nraas MasterController installed, I went into CAS and right-clicked the offending item. Doing that produces a yellow pop-up on the right side of the screen. In the pop-up, you should see the instance number of the item in question. Take a screenshot for reference. Close your game.
Open the first .dbc file from C:\Users\[yourUsername]\Documents\Electronic Arts\The Sims 3\DCCache in S3pe. Type in the instance number that you took the screenshot of into the Instance Number text box (in the lower right of S3pe). Then check the ‘filter active’ checkbox, and click ‘set’. If the offending item is in the .dbc file you’re checking, all other sub-files will disappear and you’ll see just that one (or two if there’s an accompanying thumbnail image). If all disappear, you’ll need to open the next .dbc file and check there. Right-click the filtered sub-item when you find it, and select ‘Deleted’. Save the .dbc. The bad item should be gone.
Please consider reblogging this for others’ benefit - it was driving me crazy until I discovered this solution, so hopefully it will alleviate someone else’s pain. ;)
EDIT - You’ll want to delete your cache files (probably simCompositorCache, compositorCache, CASPartCache) before loading your game again to ensure the remnants are gone. You can find the cache files in your Sims 3 folder (C:\Users\[yourUsername]\Documents\Electronic Arts\The Sims 3). Don’t worry about deleting them, they’ll re-generate automatically when you start your game.