ha, nevermind. I found it. For anyone else who wants to know, it was a file inside the theme folder in the config folder called "Rainmeter" and the line looked something like this:
[MeasureFreeDiskSpace]
Measure=FreeDiskSpace
Drive="F:\"

It was set to E:\ when I found it (that's my DVDrom drive o.0 So I changed it to my storage hd, which is the one i'm more interested in, and then just right click and refresh on litestep.