tanisha,
I think you may just want to select Window >> Show Parts Window from the menu after you open the .ctl file.
However, there's not too much of interest in there, since it's just a simple cluster of a few ring controls, and the ring controls themselves must be edited individually if you want to alter their appearance. What is it that you're trying to adjust, exactly? Maybe there's an alternative suggestion to get it done.
Regards,
John