Easter update spawned a monster (briefly)

Last night installed the latest security and Safari update ( link 1 & link 2), it was pretty much painful, meaning that the box booted correctly, etc... Except for a little thing...
Upon starting the new installed Safari, I got a pop-up with the message from the screenshot, and of course, Keywurl did not start at all (but Safari did without any problem).
It was a bummer, since the plugin was rather handy, but given the nature of the error message from the pop-up, went to the plugin's homepage. and lo and behold, there was a new version, that after installation, works fine with the newest Safari.