We do not have a download file for the latest version (6.1), but you can try downloading it from the developer's site
Download version 0.3.7.1b from Mac Informer
Version: 0.3.7.1 β
Date update: Jan 21, 2015
File name: popcorn-time-0.3.7.1-mac.dmg
Size: 36.2 MB