You will need a clean install of either RTW+BI patched to 1.6 or a clean install of RTW Gold Edition. Because we use the BI exe we can't use the mod switcher built into the game and have to overwrite existing files. Files that we overwrite are in both the RTW data folder and the BI data folder. So yes when the mod is released you should uninstall and make sure everything is gone then reinstall, install any patches that are necessary (1.6 if you don't have GOLD) and then install The Crusades.

Menader: Because the campaign is so close to being finished we will not be releasing the beta to the public.