"Export Macros" vs. "Export as Macro Library"

I'm using KM v 8.2.4 - the manual doesn't seem to give any explanation as to the difference between Export Macros vs. Export as Macro Library, or the procedure involved to do either of those. I simply want to export my macros so I can import and use them on a 2nd computer (but I do not want to Sync the two computers).

Any suggestions, or is there somewhere I can find a detailed description of these functions?