I'm not sure if I am to only one but I can't do anything with this spreadsheet.
For example buttons like "Add Customer" or "Add Products" in the invoice page don't do anything.
Please help me, as this spreadsheet looks very useful but it just doesn't work for me...

im thinking bout making a workflow workbook. somehting simple. i got mad orders n its hard to remember all of them. i figure excel would be perfect for that. stay tuned...