In terms to the iTero question, iTero is doing an internal update on their software and they have stopped all the communications between iTero and Labs (including DSDApp). In order for you to use the STL files you will need to send them from your iTero to your email (or dropbox directly if you can) and inside the app connect to your dropbox, google drive or icloud and import your file from there.

For you to save your DSDApp cases to your cloud services, you will need to export the files (As pdf, pictures or the 3D design in the STL file format) and save it in your dropbox act. 

Below  is the link to the video showing you how to export your STL files from the iTero website.