I just restored my system from an image and checked if the installed Opus version was up to date version using Check for Updates under Help. It said installed version was 11.16. Then it sat there with the progress bar spinning for a couple of minutes as if it tried to connect to something or whatever, then finally it stopped and said it was up to date. I noticed however that there was a version 11.18 on the info list so I closed the box and did another check, and this time it said there was a never version 11.18 available. So apparently something went wrong during the first check.