Please note encrypted files cannot be opened by a web browser or regular FTP client software. You must use DriveHQ FileManager 3.5 or WWWBackup 3.5 to decrypt them.
FileManager and WWWBackup caches your encryption key locally. So if you are uploading / downloading from the same computer, you will not be prompted to enter any encryption key. But if you try to download encrypted files from another PC, you will be prompted to enter the key.