Updates like this "3B" or "3C" generally mean that there's no change to any of the code in the executable, but there's a change to a supporting file - in the case of 3B it includes the files to run the 2020 32-bit Realband, and in 3C it includes updates for the PG DX Plugins. The same numbering scheme is used for Band-in-a-Box as well.

The most current update is build 3C: https://www.pgmusic.com/support.realband.htm#2021_3 - yes, this link says only "3", but the file is named "3C".


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