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"No JLink Device found" nRF51 uVision 5.13

I cannot get uVision to recognize the J-Link OB device on my nRF51 Eval board. uVision DOES work with a different J-Link OB eval board targeting the same device, the Rigado BMD-200. Both work with the SEGGER tools. The only appreciable difference between these boards seems to be that the nRF51 J-Link device has the following name: J-Link OB-SAM3U128-V2-NordicSem V1.00
The BMD-200 device name is: J-Link OB-SAM3U128 V1
The V2/nRF51 J-Link shows up as a disk drive under Windows, V1 does not.
I've tried re-installing the SEGGER drivers, changing the JlinkARM.dll version in C:\Keil_v5\ARM\Segger, and verifying the USB ID as described here: http://www.keil.com/support/docs/3576.htm . I also tried installing the software on 2 other machines; one behaves the same way, the other works normally.
Does anyone know why the V2 device would behave differently under uVision?

Thanks