Thanks a lot for the reply and for trying to help!
I downloaded the 6.13 version and tried it, together with the version I already had (I saw in your comment that there's a new version now, I still need to try it) just to check it once again, and I'm glad to say that it somehow works nicely now! I don't know why since no version changed but that's great news, it never crashed again.
Below are the notes I have, it always had the same behaviour in both versions from what I have noticed:
- The images I have clipped to folders are exported as a full black image
- The error "The command 'Merge Layers' is not currently available" appears sometimes. When that happens I just need to manually merge the layers. It seems to only happen when a layer is clipped to another one
Both cases are fine since Spine, from what I know, is just to animate and I don't think that will be an issue since clipped layers usually happen for static images (in my experience at least.) I think that those things outside the animation itself are never to be made inside Spine. In any case the last version, with the "[Overlay]" tag, might help with that already.
(Please correct me if I said anything wrong)
TL;DR: It seems like I have no issues right now! Thank you and continue your great work 🙂