I've overlooked something. I have a new SAMc21N18 xplained board with CAN transceivers. This device is available in the list when I attempt to create a new GCC project without ASF, however I need to learn how to use the CAN drivers in ASF. When I attempt to create a new project using an atmel board with ASF, the SAMC21N18 is not available, just the SAMC21J18 and all previous boards.
The ASF version on my PC is 3.35. I've tried to search for updates, atmel studio claims no updates are available.