The "XF" often refers to "X-Force" (a well-known software cracking group), and "DGT" is another common release group tag.
Similar strings appear in vintage software repositories or forum attachments related to older web board software (like XenForo plugins) or emulation tools. XFv1.4.2-DGT.zip
"v1.4.2" indicates a specific iteration of a tool or plugin. The "XF" often refers to "X-Force" (a well-known