Had older mybid pro... worked fine until awhile ago. Re-installed, set up, said I was linked to ebay. Keeps saying I don't have anything when trying to load watchlist. Any suggestions if I install again?

You did not provide your username so I can't check.
But there is an issue on eBay's side not able to get their Watch List for some users. It's possible you are affected.
I sent a message to eBay about it. Hopefully, it will be resolved soon.

It does not affect the actual sniping, so you can add items manually meanwhile.