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A couple more thoughts about reading the graphs, they can be tricky to wrap your head around.
Look at the very top of the graph where the green waterfall starts, right where the green curve "touches" the graph paper-ish calibration lines toward the "rear" of the 3d graph. if you look at this, that's the initial frequency response of the room, the moment that sound begins in the room. And you can see a swing in frequency response.... 105Hz is at around 56dB or so, and 140Hz is up at around 88dB or so. So that's a 32dB difference in volume between 2 freqencies less than a half-octave apart!
Then, you can see more curve lines, similar in shape to the first one, on the green graph in front of that. You have to think 3D to get this one. each of those curves represents a step forward in time about 10ms or so (kinda hard to read, the time calibration is on the right of the graph).
So again, what you are looking at is a frequency response graph of your room, plotted over time, with (approx) 10ms intervals. So you can see how sound decays in your room, where the resonances are, where the ringing is, and what the overall response in your room is.
The after pic shows much less difference between the loudest frequency and the softest frequency, you can see the curve is much smoother.
I hope I'm helping here, and not just being verbose..... ;-)
Tell us how your room sounds now....
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