Hey Pal sup!!. Listen about how to install a theme 1st u have to look on the contain of the zip or rar file cuz almost the time u'll find only some pix not a theme exactly so if they were pix u have to unzip the file anywhere & then go to setting in bumptop then u'll find a tap named "theme" from there u can set any pic u have on ur Pc so u have to recognize where is the wall pics & the floor pic & then just apply it, But if the contain of zip or rar file where have Some file named under "Theme.json" then u have to unzip the file & copy all the files to where exactly u got the main Program folder which it's usually in C:\ProgramFiles\bumptop.