Hi, Shawn. The problem might have to do with printer selection. Once my rulers were missing and the MXD wouldn't export. I noticed that ArcMap was trying to reference printer drivers I no longer had and as a consequence the paper settings were greyed out.
Un-select "Use Printer Paper Settings" in the Page and Print Setup menu. Set the MXD to the new printer in the Page and Print Setup dialog and set the paper size again, then check Use Printer Paper Settings. Rulers should return and you will be able to export. I don't think the ArcMap version was the culprit. . .hope this helps.,
Joe