Royce PDF Printer pops up a confirmation dialog after it figures out the destination PDF file already exists.

The confirmation dialog provides three options,

1. Insert the resulting PDF file at beginning of the existing PDF file

2. Append the resulting PDF file to the existing PDF file

3. Overwrite existing file

You can choose the option of your preference when the conflict happens.

To disable this confirmation dialog for good and all, you would probably be interested in letting the software know your choice in the Output Options tab,

1. Confirm with overwrite options

2. Insert at beginning of existing file

3. Append to existing file

4. Overwrite without asking

Unless you select the first option, Royce PDF Printer will remember your choice each time when destination PDF file is detected to be already in place.