How do I delete entries in a SEP "Detected Application" list?

I'm creating some SONAR exceptions to ignore DNS and Host file changes. 

I get there by going to Policies > Exceptions > (Policy Name) >  Exceptions > Add > Windows Exceptions > DNS or Host File Change exceptions.

When the window comes up, the file list is massive.  The "Detected Application" column shows thousands of entries for simple things like temp files.  It has a huge number of entries from one person's computer, and the path is C:\documents and settings\(user)\local settings\temp.  Thousands and thousands of files for one user's temp directory, among other things.

How to I delete these?  I'm taking over for a previous administrator who should've done some cleanup on this a long time ago.