I’ve also gone back to version 3.6.4. I’ve been using Evolve for quite a while and there is a very long history of problems with upgrades, particular display issues as when new features are introduced and changes made to the theme stylesheet, little attention is paid to backward compatibility. I also use many different themes and have not experienced this issue with upgrades to other free themes.
I always make a full site backup before doing an Evolve update and keep a copy of the working version so I can easily revert. I’d strongly recommend that others do the same.
I appreciate effort by all theme developers to keep their themes updated to address possible security issues and to keep up with upgrades to WordPress, but I really think that when major changes are made to theme layout or structure, it’s better practice to distribute that as a new and separate theme rather than an upgrade pushed out that is likely to adversely impact long-established live sites.