Hello Zoet,
if you need to change the images and use the images of your choice,You need to login to your cpanel account, go to FIle Manager > wp-content > Themes > imagemenu > images.Gather all the required images you need and click on the ImageMenu.css . Try to Edit the Code using us ascii. It should look like
#imageMenu ul li.bk1 a {
background: url(images/funzone-web-b.jpg) repeat scroll ;
}
#imageMenu ul li.bk2 a {
background: url(images/music.jpg) repeat scroll ;
}
#imageMenu ul li.bk3 a {
background: url(images/3-952-48.rollercoaster.m.jpg) repeat scroll ;
}
#imageMenu ul li.bk4 a {
background: url(images/barani3.1.jpg) repeat scroll ;
}
#imageMenu ul li.bk5 a {
background: url(images/5cce270316db4bb0d484c84b9224eff1.png) repeat scroll ;
}
#imageMenu ul li.bk6 a {
background: url(images/6.jpg) repeat scroll ;
}
`