From what I understand it should be possible to download version specific agents from here:
However, I am not able to download the 126.96.36.1990 which is the latest version we have ugpraded to
Usually this would not be a problem, but since the AppMon agent for Nginx seems to be able to use non-classic mode from version 7.2.8 it would be very nice if this was possible:
"AppMon 2018 April Update 8 Switch of the platform is not required. AppMon Agent platform is the default for the NGINX Agent. If you migrate your System Profile from a previous version, the NGINX Agent will be automatically switched to the AppMon Agent platform."