Rhino 5 evaluation software failing installing latest update

Prompts to update upon every running of Rhino but fails each time one of which is;
Error: Function: validateCDKey Property: RMA_CDKEY
Property is empty

Normal for evaluation?

Thanks
Ken

Version 5 SR6 64-bit
(5.6.31009.7465, 10/9/2013)
Evaluation
SN: 4-1500-1308-100-0003909-30996

@brian: Did you see this one?

Same thing just happened to me on my home laptop:

Any luck with this issue?

Everything works fine otherwise so it’s not a big deal at the moment, but it might eventually when newer plugins might require the update…