Open ROI manager and export z-axis profile data to Matlab

I have setup a simple Matlab code to open Fiji and open a tiff stack (calcium imaging across time); but I am not able to find the command to open ROI Manager and get the Z-axis profile y-data into Matlab. If anyone could offer some help it would be much appreciated.
thank you,

I am not 100% sure, but looking at the documentation, I get the feeling this extension is not meant to provide MATLAB access to the ImageJ API. It seems to me that it’s sole purpose is to transfer images between the two programs.