My problem was fixed: I had the same problem with the new version, not being able to authenticate my account even when i asked the app to send me another password to my email account name. It sent the password but it would never work on the ipad for the Flying app. The problem seemed to be because I had two account numbers, one for the paper version and one for the digital version. I phoned Bonniers customer service and once they combined my two account numbers into a single account for both paper and digital the app accepted the new password. Hope this helps some of you. Good magazine otherwise.
Can_182_Pilot about FLYING Magazine, v5.0.2