Won't open any longer :(

I have the free version so I know I don’t qualify for any support.
Unfortunately, I can’t seem to get the app to open any longer. I click on the icon and nothing happens. However, when I open the Task Manager – it’s there. So, I end the task and try again.
Also, none of the tools I have show the program. I use both the Windows tools as well as Revo Uninstaller – none of them even list eM Client as a program to uninstall.
Any suggestions are much appreciated.