In case you are not happy with the new version of the smartthings app here is where you can get the last two versions. I did and it was much easier than trying to make the new one do the things the old version did. Everything back to blissfully normal.
I don’t know Anything about that particular source, but there were a number of backend changes as well. Community members who have restored the previous version from their own backups have said some features, such as groups, are changed no matter what version you use.