I have absolutely no actual stake in this particular issue (I don't use Windows nor Windows Server, nor do I ever plan to)…
However, as a customer and user of this software, I consider it absolutely unconscionable that terms of service for a license would be modified in a point update to a piece of software.
I've been buying software for 20+ years now, and the very minimum terms of every (non-subscription) license have always been "If you buy version 1.0, you can use that license for all of the 1.x releases. You might have to pay to upgrade to 2.0, but once you do that, you can use all of the 2.x releases." And so on. Clean. Simple. Reliable.
The idea that you could use 2.6.3 but not 2.7 is completely absurd. It is wrong. It ought to be illegal, but that's another issue.
It violates trust between the company and your customers, and it never should have been done.
I am completely sympathetic to the fact that there are people who are mis-using the license in business settings. That sucks. But the response to some people being terrible should not include punishing others who are not being terrible. If that's what you decide to do, then you're being terrible.