OK It seems that the problem lies with the VST3 version of Vocalign.
As such once it has registered on the ilok etc, remove the VST3 plugin as mentioned before.
Then go to the Synchro Arts download page and download and instal the AU (Audio Unit Version) not the VST3 version of vocal align.
Then it should run as an AU not a VST3.
The download page is:
Hope that helps