Errors since Windows 10 download

[Steelhead215]

My YoWindow's settings were fine until I downloaded Windows 10. Now I can't even find my Home city (Tumwater, Washington, USA), and when I click on the cities that are already listed, the wrong one pops up. For example, Tokyo, Los Angeles, and London were already listed. When I select Tokyo, Los Angeles pops up. When I select Los Angeles, London pops up. What's happening? How do I fix?