If you've got the steam version, then set both Princess and Crossworlds so that they don't auto update in steam, then validate crossworlds once more, and you shouldn't have to mess around with any map locations.
If when you start the game you don't see the list of the 4 campaigns on the left half of the main menu, then your game has validated back to Princess and will not be playing crossworlds. So just do as I said (assuming steam) and you should be able to play crossworlds and the campaigns in it.
It's hard to miss when you choose a valid campaign in crossworlds as the main menu will change colors, like for the orc campaign the whole interface on the main menu turns green and the princess image is replaced by orcs.
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