There's no way that's enforceable. Any contract requires a meeting of minds, and a change of contract requires agreement of all parties. They can't unilateral

There's no way that's enforceable. Any contract requires a meeting of minds, and a change of contract requires agreement of all parties. They can't unilaterally change the terms after the fact without agreement, you can't agree to something if you don't know about it, and "should" isn't "must as a condition of use". Not only that, but I don't think they can stop you from using the model under the original terms if they change them and you do know but don't agree. At least, if you have it downloaded and are running it for yourself.