[at]shearts1789. You are running a version that cannot be updated to the latest with the updater. Also you can't export/import your old configuration. You will have to start from scratch. Sorry to be the bringer of the bad news.
I don't mean to troll, just state how strongly I feel about such pathetic design/implementation issues by people whose inherent job it's supposed to be to do these things as perfectly as can be expected in the field, which is far more perfectly than this evidence suggests they currently are doing...
I have the same version quoted, and have had no problems updating between even older versions than this before. It's never been an issue UNTIL THIS REVISION.
So, ONLY THREE REVISIONS OLDER THAN THE CURRENT, and it can't be updated? WTF is the point of an auto-updater if it can't either a) just do the update without subjecting the busy user to all this OR b) KNOW ABOUT THE ISSUE AND AT LEAST NOTIFY THE USER THAT THE UPDATE IS INCOMPATIBLE?
Seems like a case of severe FAIL at Comodo's development team end of things.