The old version on Stencyl 2.0 that was very unfinished still was very easy to do a LOT of things.
Would you be able to upload just a "no expectations" copy of the kit unfinished just so it can be used again in the new version of stencyl even if its not set up to be perfect or complete?
I say this because the original kit that was far behind where you are at now still with workarounds was capable of doing nearly most, but its impossible to load or find that version as well in current Stencyl.
The last demo you posted has virtually everything useful for non programmers, a side scrolling perfect combat engine where we can set the health and damage numbers of enemies and the main character. That in itself is a kit of infinite possibility.
Although not thaat impressive, I couldnt conceive of even getting the gist of beginning prototypes without the kit:http://www.stencyl.com/game/play/19716
Rotatable gun with ammo counter http://www.stencyl.com/game/play/13680
RPG rotatable gun shooter very unfinished attempthttp://www.stencyl.com/game/play/19134
Example of modding the original attacks to create new spells with the baseline actor you gave ushttp://www.stencyl.com/game/play/13211
A wolf that could be hacked down by the baseline characterhttp://www.stencyl.com/game/play/13093
A prototype about running into yeti monsters that push you back.http://www.stencyl.com/game/play/13789
Your kit was capable of having AI that fight eachoherhttp://www.stencyl.com/game/play/2095
A spell that spam attacks something with a particle engine from your kit
Although my demos are nothing much, it proves anyone who can make artwork but cannot program at all could have started using your kit for ANYTHING the way it was
I did not put further work into anything is because of lack of hardware acceleration at the time for games that lag in a browser.
So in conclusion, I and others would be grateful for you to release what you have for the sake of even being able to finally develop games again, as it was able to already do tons of stuff that is now impossible without a copy of this engine.