PotC Build 13 Update 4 file

Hi! First time player of your mod here!
I got a quick question, the update instructions say:
"2) Extract this file to your main game folder"

But the file I got was "b13_update3.exe", and I dont think it should go in my main game folder right?
So shouldn't the instruction be;
2) Run the b13_update4.exe installer
3) choose your install destination e.g. "download folder"
4) copy&paste; all files to MainGame folder & click yes on override.

Thanks for your help!