Just to say also, I'd been using SyncToy with Task Scheduler on a PC to manage what needed backing up and CB Explorer to do the transfer. Quite efficient actually.

Nope, not working with Explorer either, a bit sad as it was significantly better than using the Amazon desktop top tools. Need to look for an alternative, or move on to a personal cloud solution using a NAS or similar.

Can I just confirm please, who has stopped Cloudberry Backup working with Amazon Drive, is it an Amazon decision or Cloudberry's?
I use Cloudberry Explorer for moving file back and forth to my Amazon Drive, being much faster than using any of the tools provided by Amazon.