How do I rename a RBS folder?

Hi,

Running SharePoint Server 2010, I got a separate SQL Server and I am using Remote BLOB to store data on a file server. So far, everything is working fine. However, I created a new web application and as I continued to set up RBS, I scr*wed up... I executed my last query too soon, and now I'm stuck with a folder called F:\Blob_001 rather than F:\Blob_MySites , as I had intended. Obviously, rightclick + rename won't do the trick, and when I run my queries in SQL server again, at the final one I get the error:

"Msg 5520, Level 16, State 2, Line 2
FILESTREAM file 'RBSFilestreamFile' cannot be added because its destination filegroup cannot have more than one file."

I already have a number of Blob Stores that are being used succesfully, so uninstalling RBS is not an option. Could anyone please tell me how I should go about renaming this folder, if at all possible?

Thanks in advance!