I've been running 2.2.1.9 since you uploaded it the other day and I've had the popup saying that my trial has expired pop up twice on me, I have to do a full restart of VC to get it to start working again (just like a trial version) I double checked the help menu and the activate button is grayed out,
I'm not sure if this could be related, I just updated my main computer on Wednesday from windows 8.1 to windows 10 (I don't know if that has an effect on the activation or not)
Main PC: VC 2.2.1.6 (no problems, activate button is grayed out), Windows 10 64bit
Problem PC: VC 2.2.1.9 (activate button is grayed out, popup saying trial has expired), Windows 10 64bit
also, I've triggered more then 40 commands (over 12hours of use) before I would see the popup, I don't have a log file, but I enabled it after the last popup