Since isn't a standard mainstream file, it’s most likely a custom archive. Here is how you can track it down or manage the file if you already have it: 1. Where to Find the File
: Older Windows "Help" files used the .hlp extension; this might be a collection of documentation. Download 2015HLP rar
: A free, open-source, and lightweight option available at 7-zip.org . Since isn't a standard mainstream file, it’s most
: Specifically for titles that were popular or updated around 2015. Since isn't a standard mainstream file