I’m glad it helps. You are correct in installing the plugin in your project’s Plugins folder. Since you are able to compile the plugin yourself, I recommend you use this release.
That’s the latest version of RefreshAllNodes that supports UE 4.27. It adds a helpful popup message and will highlight errors in the BPs- some of my favorite features. 
(It says “for UE 5.0”, but that’s just referring to the compiled binaries with it. It will compile on 4.27)