If you want to view the list of addresses within your optimized files, you'll need a spreadsheet program like excel or something similar. Login to TheGenie and click "Optimized Audiences"
From there, scroll to find your optimized audience. Click the blue actions button and click "download audience" to download the excel (mail audience) or csv (Facebook audience) file.
You can open the file and you'll see a list of addresses. If you want to search for a particular address, most programs allow you to press ctrl+F to search within the spreadsheet.