You may be missing the point, we had units working and today when we plugged them in they no longer work.
The problem is related to the version of the board. In other words I have 4 boards here right now. 3 work fine and the other will not be assigned a com port. A partner has a bunch of the same units I have problems with and all his stopped working today also.. Oct 1 is a bad day for many Nano's .
Did Microsoft do a update? Did the driver have a time bomb in it. no one seems to know yet.
If I miss understood and you had a unit fail and you went to a new driver let us know.