??? File Not Found

hello all,

I have a bin in my ISIS Bins folder that has ??? for the file size.  I can not open it, and I can not close the project itself because I receive a pop up error window that says "File ??? not found"

Please help!  

I am running 8.4.5 on a Mac with OS X Yosemite 10.10.5---upgrading is out of the question :-/