I Need An Idiot's Guide to Downloading a Report (please)

I can't for the life of me figure out how to download a report to show transactions with defects - I had a defect for a transaction that was showing for several weeks, but every time I clicked the 'Download a report' link from the preview pop-up, I was prompted to sign in and then just arrived at a screen that said I had no transactions with defects.

 

After a few weeks that defect stopped being counted (I currently have the 3-month look back or evaluation), but now I have a different defect showing for something else and still get the same result when I try to download a report. 

 

So, if someone who has been able to successfully download a report could please provide a step by step guide letting me know what to click, where and when, just so I can clarify whether it's something I'm doing incorrectly, that would be awesome. TIA 🙂