Getting there slowly, but not without self-inflicted wounds.
Imported my listing activity. Took over 2 hours. Surprised to find it even has items that I deleted many weeks ago. Couldn't figure out how to get stuff from there into Inventory. Seems like no way, so what I did was a waste of time.
Have now selected Inventory and then Import active listings. 174 items coming down.
Which forum is best to discuss all this further? Seems like it's not very on topic to be prolonging this thread, since I'm not using a Mac.
I'm still worried it may not import my photos. Which would be a MAJOR deal wrecker.