comodo application agent is not running

when I double click on the comodo shield or the desttop comodo firewall pro icon it brings up the summary page like it is supposed to, except it has red circle with an X in it that say comodo application agent is not running. have tried clicking on run diagnostics and it says system is fine. looks like comodo is working as the shield in bottom right taskbar changes some color when web sites are visited.

what do I need to do to fix this and get back to operating?

thanks for your help.

Have you tried rebooting? If not try a complete uninstall and reinstall.