I had a report that was working on on server but not inside my studio environment. I had changed it too much. I wanted to go back and start with the report that worked. This is what I did:
In Report Manager, I clicked Edit in the Properties>General tab for the
given report. You should get a File Download window; select Save and
put the rdl in the folder where you want it. I over wrote the file I was working on. You should probably close Visual Studio before you do this so there are no issues. Another way to have done it is to save the RDL file someplace else and then import it by right clicking on Reports then select Add>Add new item then pick your RDL. You should then be able to open it in Designer.
Hope this helped someone. Have fun coding and as always, if there are any questions or suggestions, they are always welcome. Thank you.