cannot uninstall VoX ATC X demo

Hi All,I have Vox ATC 2004 UK edition (v3.27) and the VoX ATC X demo installed on one HDD, along with the respective installs of FS 2004 and FSX demo.I un-installed the FSX demo and then tried to un-install VoX ATC but I keep getting a 'Object Reference not set to an instance of an object' when trying to un-install. I've tried to remove this via the Add/Remove programs list in Control Panel, and via executing the VASetup.msi but with still varying types of the same result.What can I do? I fear this is interfering with my tweaked FS2004 set up, because I now cannot use flightplans: nearly everytime I start VoX ATC it tells me that there is no flightplan loaded despite me creating it in either Flight Sim or FS Commander and occasionally it gives me the dreaded FATAL Error. These saved flight plans worked for me before, but all of a sudden they decided to stop working. I've gotten so used to this program, that using the default is no longer an option!Cheers,NEil