No problem. As a senior noob myself, I can only help noobs anyway
1)
Cheat Engine is an app that needs to be installed for Cheat Table (CT) files to work. Once CE is installed, double-click the CT file to load it.
2) Now you need to launch the game (windowed). Then back to the CE window, click the flashing "computer search" button to select a process. Find the one ending with
-killteam.exe, Open it and click Yes on the next pop-up window.
3) The CT is loaded, the process is hooked, time to maximize the game using Borderless Gaming.
4) That's it ! Press F2 to activate the aspect ratio fix. You need to do all this every time you play, but it's matter of seconds really.