This is a bit of an old post but in case you haven't discovered this... I have been able to do this but I'm afraid to tell you how I did it because the developers will take it away... that seems to be the way these days with Intuit developments.  Anyway, I'll give it a shot... 

I found that if I change the name of the report, at the top left of the report, then choose Save As at the top right hand side, it will be saved as the new report name and not impact the original report.

Hope this works and actually stays as an option because it is very helpful.