According to the user manual, the minimum OS requirement is Windows 7 (64-bit) . For older versions (like the one mentioned in the quick guide), Windows XP was acceptable, but for modern use, a newer Windows version is recommended.
The safest source is the official XTV Suite website. Look for the "Downloads" or "Client Area" section. You may need to register a free account. Once logged in, navigate to the "Legacy Releases" or "Stable Builds" and select . Check the MD5 or SHA256 hash provided to verify file integrity after download. xtv suite 12.4 17 download