Because it is unofficial, you won’t find it on Microsoft’s website. Sources are typically forums, file-sharing sites, or personal blogs.
WinPlus X Ultra is assumed to be a Windows utility or application named “WinPlus X Ultra.” No official vendor or widely recognized product with this exact name appears in my training data; it may be a niche app, a rebranded product, or a file-name for installer packages. winplus x ultra download