The path to the CSC online help is either "C:\Program Files\Cakewalk\Vstplugin\Cakewalk Sound Center\Documentation" or "C:\Program Files (x86)\Cakewalk\Vstplugin\Cakewalk Sound Center\Documentation" depending on which version of SONAR, 32 or 64bit, is installed first. The file is called CakewalkSoundCenter.chm. One way to bring up the on-line help is click on the CSC UI then hit the F1 key.