Hi John
There is no miracle program that will do this. You will have to build the function yourself.
If it were me, I would export the QB invoices to Excel, convert them in Excel to Adagio-importable format (using formulas and the like), and then import the invoices from there.
Currently, Adagio Invoices is quite particular about the import format. If you wait until the next release (it may be months away, who knows), I know that Softrak will be making the format more flexible.
Steve