The biggest changes in this release are around license enforcement. You'll now see messaging in the product when you're approaching your subscription expiration date.
Also, we're running a new "Amnesty key" program in an attempt to get a handle on the rampant piracy of MBAM keys that exists. If we detect a key during the upgrade to 2.1.7 that is one of the keys that has been identified as being abused, counterfeit, pirated, etc. then the user will be presented with a special screen in the MBAM UI. They'll select one of two options and then be assigned a new key to use going forward. We can't just fully turn off all these keys because there are legitimate users caught up in the mess. (for example, they were victims of unscrupulous resellers who sold them a bad key--this is not the user's fault and we don't want to penalize them) The Amnesty program is purely temporary - maybe a few weeks or so, or however much time we need as we roll out this new version. Then after that it will be shut down and all the bad keys will cease to work. We're not worried about giving pirates a free key - the goal is to stop any further exploitation of all the keys that are out there. This program allows us to get a handle on these issues and lets us track the new keys in our system. The keys will only allow a certain number of activations (depending on whether annual or lifetime) and after that limit is reached no further activations can occur on that key. You may see questions about this in the forum, but legitimate users should simply answer the prompt honestly and they'll be fine. Anyone who see this message WILL get a new key assigned though so they should make a note of it for their records. You'll see below that the key is now visible on the My Account screen.