
Hi Heather Lander,
Current version of Beans (1.4 and 1.5 developed on GitHub) uses UIKit 2, since UIKit 3 is under development and is not stable yet.
They told that the version 2 of Beans, will support not just UIKit 3, but other frameworks as well, leaving in the hands of the developer to choose from.

Which exact version(s) of UIKit 2 are included? The current version (2.27.5)?

Based on JavaScript files, must be the version 2.27.1