Releases have a major & a minor version number. For example, if a release's number is 4.5, the major version number is 4, & the minor version number is 5.
The latest release, & possibly other releases, of Phil are available from the Phil Web site. Other Web & FTP sites might distribute Phil, & Phil might be provided through other channels, not necessarily by me. Such alternative distribution channels for Phil are legal legal; it's all covered in the license agreement.5.1