How to update Plex

I have noticed that an update is available for Ples and as I cannot connect to server I was wondering if this update will make a difference. But how do I update this, I have downloaded the latest update but have no idea how to install it. Do I just click on the downloaded file and it installs itself or do I have to do it manually.Please help a newbie to nas and PLEX

Unlike a regular Plex Media Server you might run on a computer or NAS device, you can’t arbitrarily update the server version. Instead, new Plex Media Server updates will be delivered by Western Digital in the control panel of the My Cloud Home.

So is there any indication as to how long it will take WD to update Plex?

Probably months…

The last update was over a year ago now. Very disappointing.