I recently upgraded all my servers to 2016, and reinstalled PRTG after downloading the latest version. I am unable to build a cluster, the option is greyed out and it tells me to go to Administrative Tools to enable. I cannot find any option for that, and all the documentation I can find is for older versions of PRTG. Has anyone else run into this issue? As an aside, I am not sure if it means anything, but I notice that the version numbers are different for the two installs. One has a plus behind it, and as I understand it, that means 64 bit. The other one does not, despite both systems being 64 bit Server 2016, and running from the same installer file. Any insight would be appreciated, thank you.