I have just updated two sites of mine that run ATS - the installs were done by uploading the pkg_ats-2.2.0-pro.zip file in both cases.
Both these sites have the versions as listed above and One of the sites is fine - no problem with the install. On the other site however, ATS is not listed under the installed components menu but if I navigate to where is should be then it all appears to have installed correctly - its just a pain as I can't see it easily - its just not listed on the components menu!
On checking back through the tickets this seemed to have been a problem with Joomla back in 2012 which is the only reference I can find to an issue like this - or have I missed something?
As ever you input would be valued - I have re downloaded the package file and re installed twice now but this does not seem to make a difference.