Well, what location did you save the black merchant robe res files? If you saved them inside the custom_res folder (this is preferred) you can delete them and Ender's client will go back to using the default.
Ok, so i have deleted both the file folder and res file, but when i log on it still shows the blue merchant robe on my clothing inventory and my file pic, but shows the pink on the screen. Any way to fix this?
Here's a list of all the locations of the blue merchant robe files:
custom_res\paginae\craft\merchantrobe.res used as an icon when selecting merchant robe from the crafting menu
custom_res\gfx\borka\cloak-merchant\ this folder includes all of the sprites used while wearing the item
custom_res\gfx\invobjs\cloak-merchant.res what you see when the item is in your inventory or a container
custom_res\gfx\invobjs\small\cloak-merchant.res used only in two places that I know of: the crafting window and the slots on the sides of the equip window
custom_res\gfx\terobjs\items\cloak-merchant.res what you see when you drop the item
custom_res\gfx\hud\equip\female\cloak-merchant.res for the portraits and equip windows of female players
custom_res\gfx\hud\equip\male\cloak-merchant.res for the portraits and equip windows of male players