Hey @SJ77,
In regards to downloads not working, this is generally a server specific issue. I'm happy to look into it for you, however, but I'll need you to PM me here and set me up with temporary admin/SSH access to your server so I can review your configuration and any errors that may be occurring.
Regarding button placement, I'll have that updated in the next release.
Regarding customers not being able to review after bulk downloading, that is indeed a bug and I will add it to the issue tracker and have it fixed in a maintenance release. Sorry for the inconvenience!