Use 7-Zip or WinRAR. Inside, you should see folders like x86 (32-bit) and x64 (64-bit) containing .dat files and sometimes a .exe updater.
Security considerations
to download update files from unofficial sources like Facebook groups. These files are unverified and could potentially contain malware or modified definitions that leave your system vulnerable. Social Media Scanner
: Note that modern versions of ESET integrate this directly into Web Access Protection rather than a standalone Facebook app. PR Newswire Troubleshooting & Reporting Update Failures