If you downloaded this .rar file from a third-party site, be extremely cautious. These archives often contain or unwanted programs disguised as game updates.
The version number in your file name (v33.1) refers to a period in late 2022. Official documentation (patch notes) for that era includes: Bloons TD 6 v33.1.5882.rar
Major updates to Paragon restrictions (limit of 3 per game) and various tower price and performance adjustments. If you downloaded this
Providing a "paper" or documentation for a file named is complex because this specific file name format is commonly associated with unofficial or pirated software rather than official releases from the developer, Ninja Kiwi . Security Warning Official documentation (patch notes) for that era includes:
Introduction of the Ace Paragon (Goliath Doomship) and new maps like Midnight Mansion and Covered Garden .
Significant improvements were made to the Contested Territory game mode and matchmaking.