After one of the last boxcryptor-updates (MacOS 10.10.1, now program-version 2.1.421), the option filename-encryption was automatically disabled for some reason. Until I discovered this, some files were encrypted with their real names. After I discovered this, I enabled the option and decrypted, then reencrypted the files. After this, the files disappeared in the boxcryptor folder. This is quite frustrating... Maybe there's a possibility to get the files back, I would appreciate it very much ;-)