After Upgrading my Server 6.6.18120.6697, I rolled out a gradual manual reinstall, by selecting 5 to 10 connected clients at a time. After completing a some 150, I find around 25 have uninstalled the previously installed client without installing the latest version. Thus I have lost connection to the clients. These clients are various Windows 7 & 10 OS running SC 6.5.16479.6613, 6.6.17081.6648 & 6.6.17808.6681
In posting this I selected ConnectWise Control Version = Not Listed. Your System recorded 2018.2 - which might mean something to you, but sure doesn't mean anything to me!
Customer support service by UserEcho