Assuming you have a copy of the version in question you can downgrade the same way you would upgrade.
* Close VC
* Make a copy of the folder as a backup (optional)
* Run the installer in the folder you want to upgrade or downgrade.
But my guess if that if your issue is actually related to VoxCommando (which it probably isn't) then it's not going to be version specific. It will be because of some other issue with your system that happens to conflict with VC (all versions) or it has something to do with your VC configuration.