My only concern with the new release is in the past the author has prided himself on going three years before coming out with versions that require shelling out for an upgrade fee. The span of time between v11 and v12 was just two years. I hope this isn't the start of a spiral towards shorter product cycles and more frequent request for upgrade fees.

(I googled the term "?rf=emst" and several of those search results relate to previous Appsumo sales. I am guessing maybe Appsumo uses that "?rf=emst" to track some sort of sales metrics.)

-disenchanted (July 12, 2016, 06:55 PM)

If I had to make an educated guess, I'm betting that emst is a generic referrer that stands for EMail Sales Tracking so they can keep track of who buys the product based on the email campaign or if someone just stumbles across it by visiting the web site. Google suggests it is a 'generic' referrer that's not tied to any one person.

This is akin to commercials on TV that tell you to mention code such-and-such when you call to order so they know which channel you saw their commercial on.