I ran the Couatl_updater2.exe in the addon manager folder and it ran successfully. The icon properties on my desktop indicates the updater2 exe file was created April 19, 2020. Did I use the right one? FYI I am running FSX.
Your Updater is old.
This because you should NEVER run the Couatl_updater2.exe but, instead, run the Couatl_updater.exe ( there IS a reason why we put a link to it on your Desktop, so you don't run the wrong one by mistake ), because what the Couatl_updater.exe does, is to download the latest updater2 and start it. If you keep launching the Couatl_updater2, it cannot "overwrite itself", so you will always get the version which came with the product you installed.
ALWAYS run the Couatl_updater.exe, which has a shortcut on your Desktop, and read my previous post about possibly having a Beta version still installed, which can only be updated manually, with the link I provided.