I recently pieced together a new PC from aftermarket parts and i am running a pretty decent CPU(Phenom II X4 945),video card(ATI HD 5770) 4Gb ram .I am still running Winows XP 32bit...i am ready to upgrade to Windows 7 64bit... Will Realflight G4.5 still work? Will i have to Reinstall it again? Is it Compatible with Windows 7 64 bit?