What happened to this great tool?

Once a great, unique and smooth app with a clean and attractive interface. Now: a completely different tool, forcing you to register with your social media or email account, stuttering on my iPad 3, old notebooks converted to flat, boring sheets that common in standard business software. Will be uninstalled. I dont understand why this new version isnt sold as another app? Would be nice to have the old version back.

gum661 about Paper: Sketch, Draw & Create, v3.6.4