You should not move anything, or have moved anything previously. Don't jack with files unless you know what you are doing.
The WB file is the scenario, but the delivered ones have mods behind them that need to be loaded when running scenario. You should not move any files that are delivered at install.
Don't run from the wb save.
They way I played the delivered content is run BTS and choose Single Player>Beyond The Sword Content" > then choose the content you want to play. If you do it that way the mod should load and the scenario is run automatically.
Note: Any folder you see in BTS/BTS/MODs folder is a mod; either delivered one or maybe something you installed yourself.
The BTS "Content" is just special stuff they delivered at release to provide some fun stuff for folks to play. But they are essentially mod primers as well, and some of them were part or became part of much larger expanded mods developed by the community - like RFC, FFH, and some of the War ones..can't remember. RFC and FFE were and are huge and popular IV mods.