After re-installing myibay and re-setting my password, I cannot import from my eBay watchlist. I says I don't have any items in my "watching" list. But I do.

Now what?

You did not provide your username for me to check, but I suspect that you did not link your eBay account so it can't access it.
Please do it here: https://www.myibidder.com/main/ebay