HTH Dialog Developers Group

I've got lost a bit. Is it all about HTH2 Beta?
3 Bella scenes sounds good. I'm surprised that there are so many from 2011-2012 era.
I'm aware of one Bella scene from newer generation of HTH - Bella missionary (screenshot attached) created in late 2012, last updated in 2015 (per file metadata). The file I've got was finished, just a little bit broken. I didn't added it to HTH offline bc is superseded by current Bella/Rio/Charlotte missionary scene. Through I considered adding it.

Regarding difficulties with Flash tools, unfortunately FFDec can't insert a frame in the middle of animation, it can insert frame only at the end, so I can't help.
AS2 was already outdated in 2008 when Crow started creating HTH. Unfortunately AS3 is integrated in Flash different way so there is no way of converting AS2 to AS3.
But I'm not surprised, Crow just keeps what he was introduced to. Even the latest (it's already more than year) build of Unity RLD  is still Unity version 2017.3.0f3