I'm going to install the Merlin Firmware on my Asus router but on all the tutorials I've watched, they say to pick the .w file. When I extracted the software, I only found .pkgtb files. I also found two with almost the same name but slightly different. They are GT-AX11000_PRO_388.1_0_nand_squashfs and GT-AX11000_PRO_388.1_0_rog_nand_squashfs, each ending with .pkgtb. Are these the correct ones and which one do I install? Thanks