Go to Control Panel>Add/Remove Programs and UNINSTALL MX3000 editor. Reinstall the MX-3000 editor. You can find the install file under C:\Program Files\Universal Remote Control..\Complete Control Suite..\MX-3000\download (Don't have it on this machine, but this path is pretty close)
Once you re-install the editor the last thing it will ask is if you want to install ActiveSync, answer YES.
You MUST uninstall the editor and reinstall it, don't just try to reinstall over the top it will not install ActiveSync that way.
There are 10 types of people in this world, There are those who understand binary, and those who don't!