Foundation Contact Form Ceased Working - Help Appreciated

[ricinport (Ric)]

@Elixir - two’s possibly coincidence but that makes three because there’s another day old post with similar problems:

Contact forms have stopped working

Since upgrading to 8.1.3 my contact forms, which were working, no longer send emails. In trying to work around this I’ve found that if I change the ‘send to’ email address the ‘Publish’ button stays greyed out (and the red ‘close’ button does not have a black dot in it). Does this indicate that Rapidweaver isn’t registering that I’ve made a change to the project?