Bump... Any chance to get a quick summary of the problem and its resolution? Was it a browser version/refresh problem, a simple oversight in reading or entering the serial number and codes, or some previously unknown issue?
I am just curious, but I think it would also be helpful to have it documented here for future users who run into similar problems. "Unlocking does not seem to work anymore, has Rigol disabled it?" is a question which has recurred multiple times here, and I'm sure it will come up again!
Thanks!