I have found, a few times lately, that different Nodes have Data in the PG3x but all of the data is blank in the Admin Console.  I've tried rebooting and reinstalling the plugin to no avail.

is there a simple way to just delete the node inside the Admin Console and then somehow nudge it to reload the Load to get a working connection?  (for reference, this is now happening with the "Land Rover" plugin.)

Pg3x is the owner of the node & it's data.. it's best to delete the nodes within each plug-in there. But normally when you do, they're removed.

If a node is blank, that means there wasn't data to update it. Sometimes it takes a while or certain events to happen. The details of that could be in the plug-in docs, or you could post a specific question about certain nodes in the forum under the plugins section.