Micah, after you do the merge, go to HDR>Tone mapping (ctrl T). There was a diet coke on the table, so I took 3 pics of it…
I usually do Strength 80%
Color Saturation 50%
Luminosity - I change often
medium light smoothing
1 or 2 for micro smoothing
1 or 2 for micro contrast
White Clip 4.0%
Black Clip 3.2%
Gama 0.96
to get rid of the watermarks, you need a serial number(I have no clue what mine was, I got it over a year ago 
)
PS: HDR images look better when it’s not a narrow debth of focus, so this looks like pooo