No, it wasn't Win 3.1. The very first version which became Windows was actually called, "Executive Manager," or some such. It was a Windows-type interface but had the different name. My memory is fading now but the word "manager" was in the title. They continued with the technology but thought the name to be too complex so they came up with the name "Windows." They just changed the name, nothing more.
Thanks, I didn't know what version it was.