Hi, I installed BM about a week ago and found out it an old version (I downloaded it from one of the portals on your official website -one of the three isn’t working anymore-). I wonder where to find and how to proceed to install the updates published in these years.
Thank you 
Buy the game.
Free version, no updates. Not yet. Maybe in someday…
The free version may receive bugfix update later on, but otherwise updates will only be made to the Steam version.