Nearly a year ago I purchased Komodo 9 and a one-year subscription, meaning that whenever a new version came out during that time it could be downloaded for no further cost. I have no complaints about the engine, but their notification policy is less than impressive - there are no notifications. (This despite my requesting to be put on a list, and the representative for the company agreeing to do so!) When a TCEC competition is ongoing it's easier to notice when an upgrade comes out, but nowadays it's easier to miss. Version 9.4 came out March 18, and by accident I discovered that a further mini-upgrade came out March 21 - version 9.42.
So for those of you who might have bought the one-year subscription when version 9 first came out, be sure to download the latest and greatest version - it is stronger than its predecessor, and the year is coming to an end in about 3 weeks.
[N.B. The title should not be taken to imply that the Komodo program is disappearing. As far as I know, the company is in good health and they will continue improving their engine indefinitely.]