If you would like access to the Ahorn plugins for the custom mechanics the Spring Collab uses, rename the AhornPrivate folder to just Ahorn - opening any .bin in Ahorn after this should then let you view and interract with these entities properly.

That said, this is purely intended for educational use - you should *not* use these entities in your own mods, so make sure to either avoid doing so or rename the folder to AhornPrivate again before mapping.

Many entities have also been made public elsewhere, particuarly Max's Helping Hand, and so those are better places to look if you're interested in using an SC mechanic in yout own mods.