Although the correct procedure would be to apply the Credit, there is a way around this. Go to the AR Manager and call the CR transaction up in the AR Entry window (you may also click ACTION, Payment Application Posting, locate the transaction, and double click on the transaction). Once the transaction is displayed in the AR Entry window, choose TOOLS, Reset Invoice Status to Selected.  If you then want to delete the CR transaction, you will first have to close AR Entry and then call the CR transaction back up and delete it.