Hi there! Ahhhh, this question has been sitting in my inbox for awhile, I’m sorry. :’D I’m not sure what you ultimately ended up doing, but just in case, here’s my two cents~
There are two types of corruption, game corruption and neighborhood corruption (you can read more about it HERE). As long as you haven’t done anything during your gameplay so far to cause actual game corruption (corruption of the game’s actual program files), a complete reinstall shouldn’t be necessary. Neighborhood corruption shouldn’t require a complete reinstall, but depending on the degree of corruption, you may ultimately have to delete the neighborhood. Some neighborhoods remain playable for months or years following an “incident” that causes corruption, so even if you know you did a no-no, you don’t necessarily need to start over immediately. 🙂
SO, if you haven’t become too invested in your hoods yet and don’t mind replacing the neighborhoods with clean templates, you can go ahead and do so. But you shouldn’t need to reinstall the whole game, if that’s what you’re asking. 🙂