Yes, the new launcher patches RomeTW-BI during runtime to have all fixes and features from ALX. This means our launcher now supports both RomeTW-BI.exe and RomeTW-ALX.exe
I also took a look at the Steam version and right now it looks like we won't be able to support the steam version of the game at all. The steam version's executable image is encrypted, so we can't even take a look at it before we manage to somehow decrypt it. Even so, it still requires the SteamAPI, which means it can't work with our launcher.