It is an older version of Scratch. And, by the way, calling it a "version" of Scratch really does it a disservice. After all, this is definitely a copy of Scratch, but it's not just a copy of Scratch; it's definitely its own entity. Refer to this post that our lovely moderators made.
On behalf of the Snap! Community, however, I understand why you'd want to leave Snap!. Something that could appeal to a certain community like you, doesn't have to necessarily have to appeal to you specifically.
I encourage you to come back sometime though: we are looking to improve the website.