It depends on whether things are getting locked down for one add-on adding/updating files to the data folder of another.
If so then there's nothing that the configurator can do, as it will be trying to put into another add-ons folder, which would then be blocked. But Webgrab itself can, as it would be pulling stuff from elsewhere into its own folder, which shouldn't be any kind of security problem or be blocked by any restrictions (if there's a block on reading from another add-ons data folder then the configurator will have to write-out to an open access folder in
userdata (wiki) or somewhere with Webgrab pulling in from that as a neutral middle-ground).
At the moment @
donbrew is getting different a outcome from me, so I think we need to know exact details of his set up and how it may be different to mine so we can get a handle on this and understand whether it's a configuration issue specific to his set-up or something more general that may need to be worked around.
The Export to LibreElec command may be useful, but it would just be a short-cut to set the settings urls to what I already have in place and you already included in the first post anyway. The key point is whether that is a good configuration for upcoming/beta versions of LibreElec or not.