As per [this mirror] of the Microsoft Knowledgebase:
Product Version of EMM386.EXE
MS-DOS 6.0 4.45
MS-DOS 6.2 and 6.21 4.48
MS-DOS 6.22 4.49
Windows for Workgroups 3.1 4.44
Windows for Workgroups 3.11 4.48
Windows 95 4.95
[this mirror]: http://www.infania.net/ms6kb/Q98768.htm)