Edit Screen Gone in Halion Sonic SE after Uninstalling Trial

Greetings friends. Can some one help me? I have Cubase 6 for Windows 64bit. I installed the trial of Halion Sonic,then I decided that the included Halion Sonic SE was enough,so I uninstalled the trial. Now in place of the edit screen is a message that says “Layer Edit Screen Not Found. Please make sure the required VST Sound Instrument Set is correctly installed!” So I can’t edit the sounds.

I guess I have to uninstall and reinstall Cubase,but I don’t want to lose my projects and presets,and I have a lot of presets. Is there a way to fix this without losing my presets?