"pmwin3.zip" - not really an official release... it was just on the OS disk I got the other versions from. I don't know about that, I just know it exists because I have the original disks, dated 1985-11-15 05:43.Edit: According to several sources, of which one says "Windows 1.0 was out for only about two weeks before Microsoft released version 1.01, in order to fix several bugs." so I do have some rather rare software I can prove all the versions exist, since I have the files for them on a CD (as well as original floppies for some of them).