According to this, WFWG 3.11 comes with Ver 4.48. Look in the Windows
directory.
I never heard of Ver 3.xx. It must have come with an earlier DOS.
If you have Version 4.45 (the one that came with DOS 6.0), you can upgrade
to Ver 4.49 using the Microsoft self-extracting file EMM622.EXE. See
http://support.microsoft.com/support/kb/articles/Q122/4/15.asp ("Updated
EMM386.EXE and MSD.EXE Available for MS-DOS 6.0, 6.2").
-Jerry