if you cleaned out the codes of any image they will revert back to default, so you have to put the images back (that you want back)
if you have skinned buttons and you dont like them, you dont have clean out the code to get rid of them, you can go into the diamond blind and retrieve the original parts, or just be patient and keep the old ones until you skin new ones and apply the new ones.
clearing out the code is a last resort if you have a major bug going on and cant fix it.
hope this helps somewhat.
on another note, you might not have clicked the apply button before you cleared the code either, so basically the taskbar ect wasnt saved cause you didnt save it.