Google Analytics problem

Still relatively newish – help needed.
I have the Google Analytics Dashboard for WP (GADWP) installed. Originally it pulled analytics with no problems – but for the last month or more it shows absolutely no visitors whatsoever, even on days when I’ve been visiting the site to check functions.

I think the problem is in insertion of tracking code into the html header, because I’m also seeing flat usage when I go to Google Analytics for the site. Problem is, I’m not sure how to pull and restore the code.

Any suggestions welcome. If nothing, then I’ll try completely removing the plugin, reinstalling it (versus deactivating/reactivating) and hope that installs correct code.