We do not have a download file for the latest version (8.0.1), but you can try downloading it from the developer's site
Download version 3.8.7 from Mac Informer
Version: 3.8.7
Date update: Jul 20, 2016
File name: onlyoffice.dmg_ga_1.50280038.1998361258.1467633725
Size: 166 MB