We are very sorry about this annoying bug.
It has to do with the time it takes to open the app. If the app takes longer than a few seconds Apple shuts down the app.
Yesterday I uploaded a new update but Apple has to review it first :( (takes normally one week).
If we test an app on our devices, we have no 'timeout'.
Please try to open the app again and again (should work because sometime the app will finish the work). If this doesn't not work please wait for the update.
Robert :/