Direct download link for CME codes: https://github.com/midhunks/Chemical-Master-Equation
MATLAB syntax to Download: In matlab, go to root directory where you want to save it, then download.
cd('rootfolder') % change it with appropriate folder
system('git clone https://github.com/midhunks/Chemical-Master-Equation.git')
MATLAB syntax to Update: In matlab, go to existing "Chemical-Master-Equation" directory and the update.
cd('Chemical-Master-Equation') % change it with appropriate folder
system('git pull https://github.com/midhunks/Chemical-Master-Equation.git')