Another option I found while looking at this is VSTSynthFont, it comes in a 64 bit version and will load a sf2.  Has really horrible UI but it does appear to work and is free (they sell a stand alone player app but the VST is I believe a free product)
 
In the top part of the UI is a button "File: SoundFont/Giga/etc .." click it and open a .sf2 then click the next button to pick the instrument/preset.
 
 
http://www.synthfont.com/
 
VSTSynthFont
VSTSynthFont is a VST Instrument version of SynthFont (VST PlugIn Interface Technology by Steinberg Media Technologies GmbH). Use together with any suitable VST host.
Now also available as a 64 bit plugin.

Versions 1.096 (32 bit) and 2.096 (64 bit) released May 31st, 2017,  are now available. Get it now!
 

Cool site, thanks. They also have a FREE soundfont editor Viena* (which does not appear to alter the file) and other useful tools that look promising.
 
*Not to be confused with Creative Vienna Soundfont Studio which requires a SoundBlaster device to work.
 
I know people say soundfonts are dying out, but so far sfz and other formats haven't been able to match the complexity they offer in sound shaping.

vSampler did a good gob in exporting them into individual soundfonts.  I have converted about 20gigs of soundfonts into sfz (extreme sample converter), and always am tasking converting those into Rapture .prog presets....