I normally just download the latest build but build 366 has this wording:

This patch will update Band-in-a-Box 2013 to Build 366 from any previous 2013 build. If you haven't previously downloaded the build 365 patch, you may wish to download download this much larger (280 MB) full update patch (includes all updates since 2013 was released). The update must be installed into your existing Band-in-a-Box 2013 folder.

How can a 50 meg patch include everything that a 280 meg patch would include?