Control-M from version 9.0.18 to 9.0.20 was released on a yearly schedule with one full release and two Fix Packs in a given calendar year.

Control-M starting with version 9.0.21 will have a major release after 28 months and then three Fix Packs released every 7 months.

NOTE:
The downloaded installation media file with the name in the format of 9.0.<version>.<FP>, includes both the GA release, and all the accumulated Fix Packs.
The same installation media can be used to apply the latest Fix Pack to the existing installation, or to install a new Control-M instance that will include all binaries up to the Fix Pack identified by the installation.