TinyCLR on cerb40 II?

Okay. Got that far. jumpered pin16 LDR to VCC and plugged in the USB.
Got ST device in DFU Mode in device manager.

Followed the instructions from here: USB Device Not Recognized - Cerberus, Cerb40 - #4 by Jockey4her

2) Erase the part and load TinyBoot
Run the DFU Tester.exe program from the programs(x86)/STMicroelectronics/software/DfuSe/BIN/STDFUTest.exe
- click Protocol tab at the top
- click Create from Map
- click Erase
- click Load DFU file
C:\ProgramFiles(x86)\GHI Electronics\GHI OSH NetMF v4.2\FEZ Cerb Family\Firmware\TinyBooter_4_2_5_0.dfu
- click the "Download" radio button
- click GO.
Reboot the part. Should ping TinyBooter.

Now the device does nothing unless I power it up in bootloader mode.

Which tool do I use to load the cerb boatloader .dfu?