Instructions
Close "World of Warcraft" if it's open.
Download a Tidy Plates theme and double-click the downloaded .zip file to open it in Windows Explorer.
Right-click the Tidy Plates theme directory in the .zip file and select "Copy." The theme directory is named "TidyPlates_ThemeName," where "ThemeName" is the name of the downloaded theme.
Click "Start" and select "Computer."
Navigate to the "C:\Program Files\World of Warcraft\Interface\AddOns\" folder on your computer. If you're using a 64-bit version of Windows, navigate to tee "C:\Program Files (x86)\World of Warcraft\Interface\AddOns\" directory instead.
Right-click inside the "AddOns" directory and select "Paste."
Open "World of Warcraft," sign in with your username and password and select a character.
Press "Enter" while playing the game to activate the chat box, type "/tidyplates" into the chat box and press "Enter" again.
Select an installed theme in the Tidy Plates configuration window that appears.