Be sure to update your script collection with this powerful midi file import feature. With this feature, you can now drag midi file from MicroTonic into Sonar's track to make clip looping, etc.., and then import it back into MicroTonic for further edits (may have to drag the clip out of Sonar first, create a file, and import this file).

http://soniccharge.com/forum/index.php?/topic/296-script-for-importing-midi-files-as-microtonic-patterns/

While that is great and all, I am still waiting for uTonic to go 64 bit.  I have found uTonic to be quite unstable in Sonar 64 bit using both jbridge and Bitbridge, however Bitbridge is a bit better.  They promise the update sometime this year.

So far, uTonic is quite stable for me, but I'm not tweaking much of the sound.. just select a pattern that I like the sound, and work on the drums part. I'm running it with the default X1 Bitbridge. 

Win 7 64bit / X1 64 bit here.. no hang from the day I tried the trial, till recently when I got the license. I'm on uTonic ver 3.0.1.