Had the same problem.
You can put the device in update mode using the instructions from the Knowledge Base FAQ #8 (
http://snap.broaddaylight.com/snap/TFAQ8.shtm) which uses the reset button above the network connector.
Once the UpdateBios.exe runs, you have to power-off and power back on in update mode and run UpdateSnap.exe.
However, once that finishes, you're supposed to power-off and power back on in update mode and run UpdateHelp.exe which doesn't exist.
I contacted TechSupport. Since the s/w update to v.3.4.803 will fix our problem, they recommended not updating the bios to 2.0.279 unless there was a need.
BTW - s/w v.4.0 will cost you $189 bucks.