It turns out that a lot of mainland Europeans were experiencing a crash on the forecast page, This has now been fixed, and if you update WindFreak to version 1.5.2, it should work. WindFreak v1.5.2
I parse the windStrength (String) to windStrength (float), floats don;t work with commas.
For European users the windStrength (String) would contain a ',' instead of a '.'
UK = windStrength (String) = 23.5
EU = windStrength (String) = 23,5
I've mitigated against this now by replacing commas, seems to have done the trick.
Check out the update for the fix!!