Is it possible to upgrade the boot version?
Before anyone says search the forums, I've already done several searches for this on here, but getting thousands of results, it's like trying to find a needle in a haystack.
I have asked this question many times myself. I've even directly asked a RigolUSA technician, and I've never gotten a real answer. So as far as I am aware, the answer must be "NO", at least not by any means that we users have available to us.
It is also not possible, ordinarily, to "roll back" to an earlier version of the "firmware" once a later version is installed. However, looking at the posts up above, maybe there is a way to "trick" the scope into accepting an earlier version if it can be re-named to fool the scope into thinking it is actually a later version. Unfortunately no update method that I know of will change the Boot Version.
And since Rigol didn't change the Boot Version of Robuster's scope they "fixed" up above... maybe there is really no way it can be done.