This version is functionally-equivalent, to 2.1 (Release) and is considered a Release version and contains a fix to a threading issue that was causing creation of the functional block hierarchy to not work in Rhapsody 8.3.
The following changes were made for v2.2 on GitHub (released 08-APR-2018 - Release build):
#247 08-APR-2018: Fix threading issue crashing functional block hierarchy creation in 8.3 (F.J.Chadburn)
#248 08-APR-2018: Update copyright notice year to 2018 (F.J.Chadburn)
It is recommended for all users of the profile to move to this version to avoid this issue. The issues relate to limitations in the Rhapsody API when trying to get GUIs to work in separate threads. The solution took a little while, but came with the help of Andy Lapping. He's put a bit of background here:
http://www.merlinscave.info/Merlins_Cave/Tutorials/Entries/2018/4/3_Building_GUI_Based_Helpers_for_Rhapsody_-_Dealing_with_Multi-Threading.html
