Complex sentence: Users have argued that reading the master password to decrypt the encrypted storage is still harder than just reading the unecrypted storage, and eventually a fork called FileZilla Secure surfaced in November 2016 to add encrypted storage.
Split into simpler sentences: Users have argued that reading the master password to decrypt the encrypted storage is still harder than just reading the unecrypted storage. A fork called "FileZilla Secure" was started in November 2016 to add encrypted storage.