BoxCryptor for Windows is storage provider agnostic which means you can use it with any provider who can be integrated in your file system.
The main priority for our mobile apps right now is to offer great support for Dropbox. When we reached this goal, we will subsequently add support for other providers.
The best is, if you request Box.net support in our Feedback Forum ( https://boxcryptor.uservoice.com/forums/100207-general ) so that other users can vote on this feature.
