QB File Doctor tool has two versions, one is the built-in file doctor tool, and another is the stand-alone version. File Doctor stand-alone version is generally used from the server and is not built-in. Whereas, the built-in version of the file doctor tool is the version that is available in the QuickBooks version 2016 and later. As per the experts, out of the two versions, the QuickBooks file doctor tool stand-alone version is preferable.