I'm very sorry if this is dumb- but I want to install this, however, I already have the regular tModLoader installed- what would you think would be the best method to getting that "fresh install of Terraria"?
If you want to keep your current tmod setup... (If not, then just delete these folders from your system and reinstall, this includes all worlds and characters not in the cloud)
1: Rename the "Terraria" folder in "C:\Program Files (x86)\Steam\steamapps\common" to "Terraria2". (Or Terraria 32, anything that isn't just "Terraria")
2: Rename the "Terraria" folder in "C:\Users\ %username% \Documents\My Games" to "Terraria2".
3: Reinstall Terraria from Steam like normal.
4: Install this version of tML in your new install of Terraria.
5: Launch through Steam.
This will allow you to boot the game from the 'new' setup and you can rename the other set of folders back to the original and vise versa if you want to play between instances. Steam will always boot from the instance that is only named "Terraria". Hope this helps!