If you are attempting to print a label to PDF using the Print function without selecting a manual printer, you may see the message that this has been sent as a printjob.

While the above option should, by default, generate a label PDF, you may see the following message indicating that the label was sent as a live printjob:

In order to rectify this, simply head to Manage Users, and select your login.

From here, change your Default Printer to Disabled: 

Removing your user's default printer will revert the printer to the system's print to PDF function.