First thing you need to do is post the OS you are using. Also post what SD software you tried or have installed.
As far as using Explorer to open the programs don't know why you need that to open a program to change something back.
I'm going to make one guess and say you installed Windowblinds. Just open your startmenu and click on the All Programs. Scroll down till you see Stardock and click on it. this will show you all the SD programs you have installed. Not knowing what you have installed but guessing you may have Windowblinds after you see your list of installed programs click on Windowblinds and it will open. Apply the default theme and see what happens.