AP EFT - correcting an invoice after batch created

We created a batch in the AP using the EFT module. The batch is ready to be uploaded into the bank. We have discovered an error (overpayment) to one of the vendors and do not want to upload the file to the bank until the error is corrected.
How can we fix the error so the batch that is uploaded to the bank is correct?

I take it that when Adagio asked if the payment generated successfully you answer 'Yes'. You will have to reverse all of the payments, correct the vendor with the wrong balance, and the redo the payment run.

Not positive if Adagio overwrites the unused payment file or if you will have to delete it manually.