The 200% and 300% versions have autotiles for the RPGMaker format. The autotiles on that terrain sheet are in the Game Maker Studio 2 format. If you want to use those ones, then the easiest way would be to upscale that image instead of re-working the RPGMaker ones. My friend fmoo made some simple upscaling tools that can do that really quickly: https://fmoo.itch.io/autotile-packing-tools