This version takes a more modern (and less straightforward) approach to triggering the text editing of the template file. One advantage is that it should no longer block the main thread if it ends up in some sort of permanently waiting state (so no spinning beach ball). On the other hand, this new approach offers about a dozen configuration options, and I have no idea if they are now all optimized for this particular usage. Any and all testing will be appreciated!
This beta version is no longer available. Look for a later beta release or the most recent Mac App Store release.