Jim, when you open your latest revision you get presented with a message reading "This workbook contains links to one or more external sources that could be unsafe". You are then presented with the options to Update, Don't Update, and Help.
When you examine the link or links being referred to, you will find it is the spreadsheet I sent you some time ago for the static couple tab. You can examine what the workbook is after by going to the Data tab, then Edit Links, and you will see what I think was my old workbook (static_couple balancing worksheet.xls) listed.
For the next revision I suggest while on that page (Data tab > Edit Links) you select "Break Link" and then save the workbook. That should eliminate the message in the future.