Tango app crashing in iOS7?

[norneDK]

I'm having tons of issues with Tango on iOS7, especially since the last security update. Just wanted to know if anybody else experiences problems with this app. It keeps quitting and when it finally launches, it becomes totally unresponsive and I can't scroll or navigate anywhere. Of course I've contacted their app support. I've never seen any other app behave this way. I think deleting and reinstalling would make me lose all the contacts which are not in my address book, so that's not an option right now.