Latest Update does not work any longer

I have been using the App successfully for a few months, then after the last update a few days ago the App crashes just after launch.

I had already tried to reset my iPhone, uninstalled and reinstalled it again, but no improvement.

Using iOS 7.1.2 on iPhone 4 (Model: MC603IP/A). About 800 MB free out of 16GB

Please fix, or at least explain how I can revert back to the previous version!

Gianpi2 about KyPass 3 - Keepass in sync, v3.4