I have a new laptop (Win 10) and migrated over my data from my old laptop then installed the latest version of Thunderbird (78.2.1). I can no longer print emails because my network printer isn't detected. I have looked at Config Editor and there are multiple lines (41) for print.printer referring to the same old printer I no longer have, and 38 print.printer lines for Microsoft XPS Doc Writer. What do I do with all these lines, please. Alternatively, is there another way of fixing this printing problem?