Vox atc not installing

Hi Guys,

I had voxatc working fine up to the last time I used it back in April  running on win7 64 on my MacBookPro Bootcamp installation.

Last night, after loading FSX, it did not complete its initialisation so I tried to reinstall the software thinking some file had gone missing.

It won't re-install returning the following message:

InstallUtilLib.dll:CorBindToRuntimeHost [hr=0x800700c1]:%1 is not a valid Win 32 application

The same message appears if I try to uninstall the application.

Any advise is welcomed as I'm going to be away from my main simulator at home for months and I need to practice communications before I with Vatsim.

Many thanks to all for any input you may have for me.