2. Playing vanilla after playing ACW
ACW mod basically copies files it needs to run from Empire Total War/ACW folder into Empire Total War/data folder. That's what the SubsPower launcher is for. When you exit the game and want to close the launcher, you wil get two choices "Vanilla ready" and "ACW ready". This tells the launcher whether to leave the ACW files there for playing next time or remove them for you to play Vanilla game. But the launcher is flawed and it doesn't remove all the files (should be updated for 3.6, but the modder that made it no longer mods ETW, unfortunately). So, when you click "Vanilla ready", the launcher removes all files except either bg_boot.pack or bg_boot_zor.pack. Just go to Empire Total War/data folder and delete any files starting with bg_ (stands for Blue and Grey). Vanilla should work normally then.