Here you can download the latest version and also older versions. BZR Player doesn't need to install, just click the bzrplayer.exe file after you've unpacked the zip-file into a directory of your choice.
Since a couple of years ago BZR Player is rewritten pretty much from scratch and is called BZR Player 2. You can download alpha versions and follow the development on GitHub, Patreon and Discord.
AUR package available for Arch Linux (using Wine)
bzr-player