Looking back at this version history [1], there was perviously a gap of 3.5 years between releases (2011-2014). Skimming through the discussion forums, the 2.5y

Looking back at this version history [1], there was perviously a gap of 3.5 years between releases (2011-2014). Skimming through the discussion forums, the 2.5yr gap between 19.00 and 21.07 was filled with a number of alpha and beta releases, eg 20.02 [2]. Version numbering seems to follow a consistent yy.## format since 2015. [1] https://sourceforge.net/projects/sevenzip/files/7-Zip/ https://sourceforge.net/projects/sevenzip/files/7-Zip/ [2] https://sourceforge.net/p/sevenzip/discussion/45797/thread/9dbfea1e30/ https://sourceforge.net/p/sevenzip/discussion/45797/thread/9...