Okay, i found out what the problem is due to the different GUI. My NZXT CAM is version 3.3.0 while yours is 3.5 or newer. NZXT changed the GUI when they launched version 3.5.
The named tabs at the top have been dislocated to the left side as a column and instead of tab names, there are images. But the rest seems same.
So, if you want to edit your LED settings, pick the 4th icon from top (looks like tachometer) to get the Tuning page.