Unfortuantely, for the moment we do not have an uninstaller for UltraChannel, you'll have to delete the files by hand. Luckily, UltraChannel and it's dependencies are isntalled at a select few locations.
C:Program FilesCommon FilesSteinbergVST2EventideUltraChannel.dll (64-bit)
C:Program Files (x86)Common FilesSteinbergVST2EventideUltraChannel.dll (32-bit)
C:Program FilesCommon FilesAvidAudioPlug-insEventideUltraChannel.aaxplugin (64-bit)
C:Program Files (x86)Common FilesAvidAudioPlug-insEventideUltraChannel.aaxplugin (32-bit)
C:Users<username>DocumentsEventideUltraChannel (the whole directory)
Glad to hear you like H3000 and UltraReverb!