Will not show screen

I just downloaded eM Client to my Windows10 Acer computer. When I try to run it nothing appears on the screen. No error messages. Nothing. Task Manager shows eM Client (32 bit) running as a background process. What could be the problem?

I have had that happen on the odd occasion. Just end the EMClient task and reopen EMClient. If still won’t reopen then reboot PC

If won’t open after restart, uninstall and reinstall EMClient as something may have gone wrong with install.