Wells Fargo is upgrading its Windows app to work exclusively with Windows 10. This comes just days after Bank of America released a Windows 10 app of its own. Prior to that, online brokerage giant TD Ameritrade released a Windows 10 app which came after one from American Express. Wells Fargo said the new app will be released to Windows 10 users by late June and will not run on older versions of Windows. Users of older versions of Windows can still access their accounts through a browser.