Another new beta is out with some more transitions and transition options (sliding horizontally and vertically). Game details, platform details, and platform game boxes now slide by default.
This beta also has an updated setup; let me know if anyone has issues with it. The installer now checks for the .NET framework 4.5 and will download and install it if necessary. Also, Big Box (and actually LaunchBox too for a while now) require DirectX, so the installer will install any necessary missing DirectX libraries as well. However, DirectX is only installed on initial install, not on upgrades (due to the system admin requirements for the DirectX installer).