Parking partner creates the click and drop labels and manifests all with the same name as clickndrop.pdf. We have to close any previous pdf file before creating any new label.
Yes, that is correct.
If the program you are using to open the PDF is locking the file then you can choose Save, rather than Import, and import the labels from the Carrier menu or use another PDF reader that doesn't lock the file.
Chrome, Firefox or Edge, will open without locking the file.