Sorry to reactivate but this is the nearest discussion about my issues:

Managed to create an animation by a full drawing, separating it into layers in GIMP,
creating meshes and bones and animations in Spine.

1. issue: Can I "Unpack Textures" with Spine 2.1.27 or load them anyhow, if i unpacked them in another version?
(Now I can unpack , let's say for a monster, a *.sprite.combat.png in the latest version, so I have each layer as uniqe PNG, but still have to puzzle them then in GIMP.)

2. issue: When I puzzled some existing PNGs, put them into spine and export from there, the result is way too big. If I try to scale at export, it only affects image quality not the actual Skeleton or animation.
How can I scale the whole project without loosing image quality?