From what I can find this controller was originally for Windows 98/ME/XP (at least the mode 1 & mode 2 versions) and I can't really find specific drivers for it. Since it is USB they may just load automatically when connected. However, I saw one irate comment saying the Hobbyking 6ch RC Flight Simulator
(mode 1) &
(mode 2) don't work in Windows 7. You say yours worked in Win7 until you reinstalled so maybe that is not the version you have?
Are you saying you have an X-Box controller ALSO? or that it sees this controller as if it is an X-Box controller? If you go to control panel > devices and printers do you see your RC controller in the list?
Do you belong to a forum that uses these RC controllers? I'm not much of a gamer and even though this has apparently been around since Windows 98 I never even heard of this type controller until your post. Perhaps an RC forum might have people with actual experience using them.