If you've saved all your files to be converted in a specific folder, you may want to save time accessing that folder by defaulting PDF2XL to open it automatically when you click the "Open" button.
Regrettably, the default folder is set by Windows so we have no control over it, nor can we modify the path to select a different folder.
That being said, it should automatically set to the last folder that was used, so by opening a file initially, you can force set it to default to that folder when clicking the "Open" button.