The information below was buried in an old post, but I had trouble finding it when I wanted it, so here it is in its own post:

Finding the version information in Office used to be easy; it was always under Help-About, but Microsoft has apparently decided that this information might frighten the uninformed, so they have decided to hide it:

• In Excel 2010 it is under File-Help
• In Excel 2013 it is under File-Account-About Excel