I had not been in the Control Center for some time. I opened it in version 8.0.298.0 of the Free ZoneAlarm firewall and was surprised to see a blank display! Specifically, the window title shows, and so do the Check Point and ZoneAlarm logos at the top of the form. The divider between the left and right frame shows and the Help link at the bottom of the left frame shows, though there seems to be no link behind it.
I tried: 1) Installing the latest version, 9.1.007.002, over 8.0.298.0. Nothing changed, except I am now getting a window that asks me if I want a network ZA sees as new to it kept in the Internet zone or allowed into the trusted zone. That is evidently something new in the latest version. 2) Uninstalling ZA entirely, then installing the latest version. I still cannot see the Control Center content, therefore cannot manage ZA. Waaah!
Please help me see, again!
And a big THANK YOU to GaryWa for another problem version 188.8.131.52 gave me. The zlclient.exe process was eating 30 to 50 per cent of my CPU, until I used your tip to turn off debugging. You're terrific, Man!