Insert link doesn't work since update

All was well until I tried to include a link in my first email after the update, but now when I click Insert>Link and paste the link in the box it simply repeats the text I want to insert the link into and refuses to paste the actual link address.  Am I going barmy or is there a fault?

On the latest version available at http://www.emclient.com/release-history, it works as always.