This appears to be a specific version number () of Xilisoft Video Converter Ultimate , a now-discontinued but once-popular video conversion software.
Easily pull audio tracks from videos and convert them to MP3, WAV, or AAC. Batch Processing: xilisoft video converter ultimate v7819 build 2017209 full
It is always recommended to download the latest version directly from the official Xilisoft website to ensure security and compatibility with Windows 10/11. This appears to be a specific version number