Should a previous version of REW be unistalled before installing the latest version?

Attached is my room response before and after tuning the BFD. I have a 10" dayton Titanic home made sealed sub I am using. Look forward to comments. I hope I attached the graphs right.

Need to work on a house curve next, Does it matter how many filters were used? this one uses 7 filters Peter

Here's my first attempt...not sure I'm doing it right, but it sounds better...:dontknow: Oh, it's a Velodyne DLS-5000R and my AVR crossover's at 60Hz.