Just to follow up on a few updates: The hotfix for this issue is now out and we’re still pushing for this to be on Microsoft update: http://blogs.technet.com/b/sbs/archive/2015/03/13/the-ms15-10-security-update-for-windows-server-2012-r2-essentials-and-the-client-restore-functionality.aspx
If you have a 2012 R2 (and only 2012 R2 Essentials is impacted) you’ll need to install this hotfix on all workstations to use the console to restore files.
You cannot restore files and folders from Server Essentials Backup on a Windows-based computer after installing MS15-010
https://support.microsoft.com/en-us/kb/3045682