That's strange, do you have both Nightlife and University? If so, I don't see how it would mess up your game, though I'm not exactly an expert in this area.
There should be only two packages, one for the lot itself and one for the tree. First, delete everything in the Teleport folder. That's where lots are installed initially, then the game moves them on startup. I've found that occasionally something gets messed up there, and can cause problems. If that doesn't fix the problem, or if you don't have both EP's, use Clean Installer to search the downloads folder for the two packages, and delete them. Alternatively, if these are the latest files you have installed, open the File Manager, open the Downloads folder, arrange the list of files by Date Modified, and delete the two files at the end of the list (either the beginning or end, whichever ones have the latest date). This should remove both packages from your game. Make sure that the courthouse has not been placed in any neighborhood; delete it first in game if it has.
Thanks this is decorated just the way i wanted it. It is hard to find a court house that actually is decorated like a courthouse.
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