DNG Won't Recognize CR2

Hi,

I took a ton of pictures in RAW today on my Canon EOS Rebel SL1. I downloaded the DNG converter in hopes of being able to edit them, but the program keeps telling me it can't find the CR2 files (even though I am selecting the folder where all of the files are). Can someone tell me how to fix this? I am on a Mac, and would really rather use DNG program because some of those online converter sites are very sketchy.

Thanks!