RegEx - How to select the second comma and everything after it

I'm using UltraEdit. I have a text file that contains strings like this

Workspace\\Trays\\Dialogs\\Components, Expand, kThisComputerOnly, P_BOOLEAN },
WebCommonDialog Sign_Out, Left, kThisComputerOnly, P_INTEGER_RANGE(0, 4096) },
ThreeDTextDlg, x, kThisComputerOnly, P_INTEGER_RANGE(0, 4096) },
Preferences\\Graphics, CtxDbgMaxGLVersionMajor, kThisComputerOnly, P_INTEGER },

UltraEdit allows PERL, UNIX and UltraEdit style RegEx. I need to select the second comma and everything to the end of the line and delete it.

Using regexpal.com I've tried several different approaches but can't figure it out.

/,\s.+/ selects the first comma
/[,]\s.+/ same as above

I can't figure out how to select the second command and beyond.

I have also search StackOverflow and found several examples but couldn't change them to work for me.

Thanks.