Seven months ago I bought the upgrade: after the purchase I looked up into the forum and I get appalled reading that the software I had just paid seems discontinued.
Worried, I wrote an email to the support, but no answer was received yet.
The website doesn't notify that the software is no longer updated, in this page the author wrote: I’ve got dozens of new MarkdownPad features lined up for development this year, and I can’t wait to share them with you.
The software is no longer updated since 24th December 2014, but at the bottom of the page we read:: Copyright © 2011-2017 Evan Wondrasek / Apricity Software LLC (the bold is mine).
So, mr. Evan Wondrasek, in respect for those have bought your software, why don't you come here to clarify the situation?