Since I have a 3.4.1 version with plugins installed on my old PC, I copied the whole folder from Programfiles. I then uninstalled Cura on my new PC, then copied the folder over of the full Cura with plugins. I opened Cura but the plugins were not there, strange that the folder has the plugins for one PC and not the other.
I've got 3.6 printing fairly well, I guess it's just time to move on.
Thanks for the information here!