where is the settings menu? I can't find settings.pngtb anywhere. It's not in the .zip
Ah, settings menu was the wrong phrase to use. It's actually a settings file located within the software. I was asking for a dedicated in-software settings menu.
When pngtuber plus is open, hit escape to open the file explorer. It will open the appdata folder where the files are located, you want to open the file named "settings.pntp". If you don't already have software like notepad++, sublime text, or geany you can open this file in notepad.
In that file you want to look for "maxFPS", and change that number, only the number, and then save it. For me it was originally set to 144, so you may want to look for that number. Changing it to 60 worked, but you may want to go lower to 30 if you want the lowest resource usage.