This version focuses on modernizing the game's compatibility and accessibility:
The file contains the Spelunky HD version 1.47 update, which was the first major update for the game in seven years (released September 2021). Installation Instructions Spelunky.HD.v1.47.rar
If this archive is the standalone patch for a non-Steam version (like GOG): the folders and files from the .rar archive. This version focuses on modernizing the game's compatibility