Try it only from the official website (b1g.org). For everyone else, stick with VLC + the VLSub addon. Score: 3.8/5 (Docked 1.2 points for installer issues and HEVC performance).
He navigated into the folder. There were no readme files, no license agreements, no uninstallers. Just a single executable: B1gPlayer.exe . B1g Player For Windows