..then there appear to be remnants on the machine. Have you tried using the Windows Installer Cleanup Utility to find and remove any remnants of the program? If not, here's the link:
A little search for those file names shows your error to be quite common.
Hope this helps.
My system is XP pro/SP3 on an ASUS P5QL/IntelE8500/NV8800gts. I'm running FSX/Accel and it froze at startup giving me a 'fatal error' message in these areas - 'fsx.exe' 'visualfx.dll'. Suspect downloads have been uninstalled.