This can be of various causes:
1- You have two versions of Warband installed and it is loading the non 1.153 version
2- You have steam version 1.154 (because steam updates automatically)
3- You don't own a legit version of the game
4- Wizard stuff happening or WSE refusing to load with steam for example
If you do really have 1.153, go to the mod folder and enter inside the folder with WSE, right click on WSE.exe and make a shortcut. Start the mod with the shortcut when you want to play. It's in the quote bit but I just realized I mistook the left with the right click. Sorry.
As WSE will not be updated to last version anytime soon it seems, I will try to remove it for next version, it will take down some features alongside but nothing indispensable.