I created an .mxd file on a computer with an earlier version of Windows (I was at a college campus; not sure what version). Now, on a computer with Windows 10, the file appears as a Word .DOC and ArcMap cannot open it. My only idea was to reassign the default software type that opens the file, but that did not work.
My mxd is a word file? cites a similar problem and says installing ArcGIS 10.3.1 on the Windows 10 machine will fix it, but I already have ArcGIS 10.3.1 installed. Also I don't think that would be the problem, because I can open other .mxd files, and Windows Explorer is interpreting the file as .DOC regardless of ArcGIS being installed or not.
Any tips for converting this back to an .mxd I can open on a Windows 10 machine using ArcGIS 10.3.1?