App Store Thinks That I Have CodeBox Installed...
Not sure exactly where to ask this question, so I apologize if this is in the wrong subsection.
I have a mid-2010 21.5-inch 3.06 GHz Intel Core i3 iMac. I recently updated to iOS Mavericks from iOS 10.6.8 Snow Leopard, and ever since then, whenever I try to update my installed software the App Store thinks that I have an app called CodeBox installed. I never installed such an app; in fact, I never even bought it. It's $9.99 on the app store, and it's not showing up on my list of recent purchases.
I'm fairly sure the App Store thinks that someone logged into their Apple account on my computer and installed it, but I'm 100% sure that the only other people besides me that have had access to my computer have no idea how to use developer programs, and have not purchased developer software of any kind, ever. I've tried to update it, but it said "Update Unavailable with This Apple ID: This update is not available for this Apple ID either because it was bought by a different user or the item was refunded or cancelled." After I click OK, I got "We could not complete your request: There was an error in the App Store. Please try again later. (null)". After clicking OK again, the process just repeats if I try to update it again. I've searched my entire computer for the CodeBox files, but nothing shows up. I have not yet tried messing around with Terminal or tried to find hidden files, but I will if nothing else works.
After doing everything that I can think of to either get rid of it, I'm now forced to ask for help on the forums. Should I directly contact Apple, or is there something I can do to get rid of the app Apple thinks I have installed on my computer?
EDIT: My Apple account was accessed without my permission a while back, but I immediately contacted Apple to get the purchases refunded and changed my password. The hacker was in China, and never had physical access to my computer. They never downloaded any software onto my computer. I've looked at all my recent purchases periodically ever since then.
iMac, OS X Mavericks (10.9)