Well as i could understand from what you mentioned, you tried to remove the Dragon Soul Alchemy but i guess you failed because it still tries to read the dragon soul table file.
Make sure your locale folder is /locale/germany and make sure that the dragon_soul_table.txt file is here aswell.
About this error(SECTREE_MANAGER::ForAttrRegion - Unhandled exception. MapIndex: 1) it is just as simple as going to the player database and clear the object table.