How to add a C:\ to the "find in" in utility panel

I can't seem to find a way to delete previously stored paths in the find in drop down menu, but specifically I want to add C:\ so I can either search the C or D drive, and I cannot figure out how to modify anything in there. Your help would be greatly appreciated. I was previously working in Windows 7 for six years and all this just seemed to work, but now that I'm trying to set up my new Windows 10 machine it seems like it's just a lot more difficult.

0015

It's a history of the last folders you searched. Since C:\ is already the target folder, click the Find button and it should then appear in the menu list.

Yep ..... That did it, Thanks Leo