I see why no one here uses n-Track. I tried the demo and was able to use their plugins with Sonar. Only they would mute the audio track every 6 seconds...
 
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So I paid to upgrade thinking this would stop. Now when I use their plugins with Sonar I get a warring:
 
"Unregistered shareware reminder. This message will not be present in the registered version. [Buy online]"
And they still mute the audio every 6 seconds. Not only that they also crash Sonar sometimes.
 
I wrote them about it and they said "unfortunately we don't support using n-Track plugins with other plugin hosts."
At least I can import the audio into n-Track, process it and export it back to Sonar.

Its pretty common for host vendors to have plugins that are locked to their host, especially if the plugins are not sold separately.
This isn't a SONAR issue so I'm marking it as solved.

Thanks Noel. It was really meant to be a notification post more than a problem to be solved post.

We're not out of the woods yet. They now say the plugs should work even tho not supported. For some reason tho, today Sonar plugin scanner won't even see or load them even after system reboot. Very strange!