Actually, there was Windows 3.1, Windows 3.11, Windows for Workgroups 3.1, and Windows for Workgroups 3.11. Seriously, all 4 versions exist. I have the installer discs for all of them them archived somewhere. WfW 3.1 was very short-lived due to serious problems, and WfW 3.11 quickly replaced it (think Win98 and Win98SE). The basic Windows 3.11 was sort of like a service pack for 3.1, and did not include the workgroup networking features that WfW 3.11 did. Only WfW 3.11 is commonly known as the "3.11" version, probably in part because it was displayed in the boot logo. In just plain Windows 3.11, the boot logo still showed 3.1 (even in an OEM copy), and you only saw the 3.11 version in the About screen of the Windows apps.
Unfortunately, not many people know this, and many of the Windows history websites are also missing this information. However, even I did not know that they were still issuing licenses, nor had any level of support for it. I know there are still Windows 95/98 machines out there, but I can't believe there are still Windows 3.1 machines alive and kicking in the corporate world. That's just sad, really. I mean honestly, you could argue the point of if it works, why fix it, but there's so much functionality that it's missing, it's not even funny anymore. Windows 3.x wasn't even a true operating system, but rather just a GUI shell for DOS.
Anyway, glad to see it's finally going bye-bye. It was decent for its time, but its time has long since passed.