I’m seeing the same problem here, with 22.214.171.124. Basically once a file is uploaded you cannot replace it or modify any properties from the WordPress Admin pages. This is pretty fundamental.
Not sure I understand the file browser workaround : When I view files via the admin file browser and click Edit I have exactly the same problem.
Is it safe to downgrade from 126.96.36.199???
WP-Filebase Pro 188.8.131.52, WordPress 4.0 and 4.1