I've recently started having the same problem. Usually deleting data and starting again 'fixes' the problem, but even that doesn't work anymore. I've tried e-mailling technical support, but they just advised me to do everthing I already told them I tried to fix the issue.
I have the UK version of both the Pro and Active versions - both do the same thing - the app crashes just before getting to the PIN screen. I also noticed the blue led doesn't flash, which it did before when entering Wena Pay. The crash report mentions a Null pointer exception & I've seen a popup saying "NXP SDK is not correctly initialized" which sounds a lot like something of the app/device isn't being set before it's getting used...
