The solution is simple:

First go to "explorer(dot)plexhive(dot)com/network" and then click on add nodes.

The bottom window where the addresses end with "onetry" is interesting!
Copy the first address (click on the small button in front of the address)

Now open the console (go to Help/Debug Window/Console) and paste the address into the field below. Press enter.
Now you will see how it pings the address and adds it.

Some are offline, others are going, it is best to add them all one by one (54).
From now on everything will synchronize automatically.


I hope this Help