Apologies if this has probably already been noted in the forum:-

Following the guide on the main store page (which I did), the instructions are missing what sounds like a fairly important step that is noted in the top sticky of this forum (Fallout: London Quick Start Guide & Common Bug Fixes) - after installing Fallout GOTY, "Launch Fallout 4 atleast once"

I haven't played it properly yet, but I imagine missing this step will cause problems at some point.
I am guessing I need to uninstall everything and start from scratch?
It would be good if the main store page is updated with this extra step.