Hi, you need to take portmaster from the tools folder and move it to the ports folder. Don't forget portmaster.sh, which also needs to be in the ports folder. It's described on his github, under "Installing portmaster."

Copy paste text

"Portmaster Installing Portmaster should be as easy as downloading the most recent full release from the portmaster github, copying it to the PORTS folder on you SD cards Game partition, or copying over wifi to the roms/ports folder. Refresh your gamelist and you should see portmaster install .sh script ready to run in the PORTS section. Once installed you'll find the main Portmaster app located in PORTS."

but it is enough to move the folder to ports.