If you get problem, yes clean your NPC DB, for it,
- If you want remove all, closes all WRobot windows, go to folder "\WRobot\Data\" and remove file "NpcDB.xml".
- If you want remove only vendors and keep your others NPCs like this (click on "Del" key to remove): 2016-08-21_20-38-27.mp4
After, add vendor of your food/drinkin "NPC DB" or your profil manually.