Little-known anti-malware programs display warnings, which are often identified as false positive. Nevertheless, it is recommended to recheck the file with your antivirus software after downloading.
We do not have a download file for the latest version (8.2), but you can try downloading it from the developer's site
Download version 4.0.0 from Mac Informer
Version: 4.0.0
Date update: Oct 11, 2016
File name: macbooster_4.pkg
Size: 26.4 MB