Please bear in mind that the app was initially developed during our free time as a candidate for the Evernote Developer Competition, and we're not making any profits out of it. We are however aware that the app has quite a large user base and as we love the functionality it provides and use it ourselves the app is still being developed. We can't constantly keep working on it, but we release updates from time to time via the built-in update feature. For example, we added synchronization support for Dropbox and Google Drive over the past years.
We too see the data protection issue in today's internet quite critically and do everything we can to keep your data save; this is also why we decided not to include any ads or adware with our app (even though preventing us from receiving monetary gain).
In the past, the app was available via the Evernote Trunk, which was replaced by the Evernote App Center. Our app isn't listed there, but I have already contacted the Evernote developer team regarding our submission to the new App Center.