Can't connect MP via Bluetooth since upgrading to Windows 7 - "Element not found"

I've been using 1.2.84 for many months and never a problem connecting via Bluetooth using my old XP laptop.
I just got a new Win 7 laptop and can no longer connect via MP.
I immediately get the message "Connect Failed".
When I select "Details", there is a message "Element not found" and some debugging info. I'm using the RCTimer Crius BT board.
Connecting via Putty works fine, so I know that BT and port setting are fine.
I also tried 1.3.1 and 1.3.1.2 - same issue.

I tried it on two Win7 machines (32 and 64 bit) with the same result.
- Any ideas?


The report concerns Mission Planner's Bluetooth connection on Windows 7 with an RCTimer Crius BT board; Putty connects successfully while Mission Planner reports “Element not found.” Start by reproducing the failure on both 32- and 64-bit Windows 7 machines and inspect the connection details. Done means Mission Planner connects over Bluetooth without the error.

Written by the indexing model from the issue text.