Wow thanks again for that very rapid and detailed reply.
Still no luck, though. Still unable to transfer my edited songs back to the pedal.
When I open BBManager on my MacBook Air without the pedal connected it is now opening my project.
When I hover over the project explorer bar as you suggested it gives me this location:
/users/myname/Documents/BBWorkspace/user_lib/projects/SMcardonBB - Project/SMcardonBB.bbp
Then when I connect the pedal “synchronize project” is grayed out. When I then try “export project to SD card” instead, and select the pedal (“NONAME”) it returns with a list of folders on the pedal (data, drumsets etc) but with the file SMcardonBB.bbp and other files grayed out. If I then type “open” it goes through files one by one asking whether I want to delete first, skip or abort, like before.
BTW I have ordered an external slot reader from Amazon as you suggested - they are not too expensive, about $20.