The following thread, while it is discussing the older first gen v4.x My Cloud, details a method of upgrading Twonky on a My Cloud. You may want to see if that method will work on v2.x and let us know how it goes. One or two posts in that thread mention the v2.x firmware and some possible issues.
https://community.wd.com/t/wd-my-cloud-twonky-server/157258
It should be noted that upgrading Twonky is not officially supported by WD and doing so may cause problems with the My Cloud and or its firmware. And as always using SSH may potentially void the My Cloud warranty.
