We do not have a download file for the latest version (6.5.5), but you can try downloading it from the developer's site
Download version 6.4 from Software Informer
Scanned by 7 antivirus programs on Jan 18, 2019.
The file is clean, see the report.
Version: 6.4 (x86)
File name: visiwinnet_professional_v642_en.zip
Size: 634 MB