why?
if it's all working then just leave them compressed, it will save your hard drive space.
if you don't like the colour just turn off the option to show compressed folders in a different colour.
open my computer, click Toolsmenu > Folder Options, click on the View tab scroll down the list and about 3 from the bottom should be - Display compressed files and folders with alternate color, just un-tick it
otherwise you will have to uncompress every one individually by right clicking on it and selecting properties, clicking on advanced and then taking the tick out of - Compress Contents to save disk space.