Overclocking Pi4 using CommanderPi

Hi all,

Just started with a 4GB Pi4 a couple of days ago and decided to go with Ubuntu Mate (Release 20.04 LTS 64-bit). So far, so good. I only had to solve a little problem with bluetooth support. Now I want to overclock the Pi4 and I know how to add the correct parameters to config.txt. However I'd like to use CommanderPi, a nice app made by Jack477 for Raspbian OS. The install script generates an error in Mate and I don't know how to solve this. Hope someone can point me in the right direction.

thnx,
TeT

I looked into the Python source code and there's a lot of hard coded file paths specifically for Raspbian. Furthermore I guess this is for 32-bit Raspbian and I'm running 64-bit Mate.
So I would like to rephrase my question: Can someone recommend a nice graphical system utility to overclock the Pi 4 and to monitor CPU frequency and temps?

Thnx again,
TeT