Something seems to have gone awry in 5.1.40 Windows server. It’s subtle. When connected from a windows client over time mouse clicks stop being recognized on the server. I wish I had a text based window open because I could advise whether the problem involves ALL key clicks or just the L/R mouse. The problem repeated many times. Sometimes it takes an hour or two before it occurs but the nice thing (for testing) is that you don’t need to do anything at all to bring it on. Just set up the connection between two windows computers, go home, come back in the morning and you should observe the problem. I have backed the server down to 5.1.26 and all is well. (Client: 5.1.26 free on Windows 10 home, Server: 5.1.40 free on Windows 7SP1).