You are a genius my friend.
After deleting the LocalServiceComponents as you suggested I was a little concerned as the "local" menu option had disappeared. However, logic says this was to be expected. On re-downloading the plug-in all appears to be working as it should.
Many thanks for your...
For some reason I can no longer change settings on my NVR Configuration>Local tab because the save button won't work.
This means that I can't amend any of the settings shown on the attached image, they simply revert back to where they were when leaving the page.
I've used IE, Edge, Chrome...