It seems that Fire in Maxwell and SketchUp produce the same warm result, not as extreme in this model though, but still quite visible:
FIRE in SketchUp (Quality "1" (min), SL 9):

FIRE in SketchUp (Quality "7" (max), SL around 9)
Resized in PS (no color correction):

FIRE in Studio (Quality "10" (max), SL ?)
Screen dumped and cropped in PS, since Studio kept crashing when trying to Save Image from FIRE

:

Maxwell Render from SketchUp export (SL 9):

When importing the SketchUp-produced mxs into Studio, the sun-time was all wrong. Environment Setting was IBL (use for disabled: Sky Dome). Weird.
Had to change to Physical Sky (where the time-settings was written correctly), click the time a minute ahead and back again to update the sun position. Then return to Sky Dome...
And all those many buttons and panels and sliders and hidden windows and... I'm glad I never have to use Studio.
A little extra request: Could you make it possible to save the Fire-image when Fire is stopped?
/Stefan