ExtendSim 9 was released July 17, 2013. The ExtendSim 9 series reached its EOL on October 28, 2019 with the release of 9.3.1. There will not be any further ExtendSim 9 updates or security patches.
ExtendSim 10 was released October 2018 and we supported transitioning from ExtendSim 9 to ExtendSim 10 for over three years. That support ended January 1, 2022 and ExtendSim 9 has reached its EOS.