Ted,

Okay, I unzipped, and ran the application (MotorAndMeasureTest) that you emailed to me, via a bluetooth connection to the Serializer, and it works just fine for me.

I'm able to start/stop the application many times w/out it locking up.

I don't know what else to try my freind, as we've never had anyone encounter the problem you have defined.  Can you try it on another computer?  I tried the currently released 1.2.2.3, and an upcoming 1.2.2.4 version, and both work.

Have you tried 'Unpairing' the Bluetooth module, and then 'Re-Pair' (no pun intended) it using the Bluetooth Wizard?

If it's a bad bluetooth module, I'll be glad to send you another, but I have to know for sure that this is the problem, and not a odd configuration on your computer.

I would try that next...