Hi Mason, I'm in the Pacific Time zone...so I’m just next door

Thanks for exploring this a bit more, it's good information.
The name of the sound gauge is "
btsSND.dll" specifically, is this what you meant? "
btssound.dll" is no longer used or included, it can be removed from your safe-list in FSX.cfg. Be sure to confirm you are using v01-06-08 if you haven't already.
It's possible to comment out the dll's in the
PANEL.CFG file. And that's the best way to debug this. Here's an example below. Use
// and renumber all the
gauge# to keep the gauges in sequence. The RV will be missing some functionality, but it should not crash. By a process of elimination you should be able to find which dll (possibly all of them) is causing the crash. There are four panel.cfg's so just a small reminder to test the matching RV. These are all 32bit dll's so one suspect is how they are managed on your 64bit system (outside of your 32bit programs folder). Did you move your FSX folder? It could be that FSX's registry path is invalid - there's a Flight1 fix for this.
[VCockpit01]
size_mm=256,256
pixel_size=256,256
texture=$vcDigiFlightII
background_color=0,0,0
//gauge00=btsXML!BayTower_XMLSound, 0,85
//gauge01=btsSND!sound, 0,0
gauge00=btsRV7_configG!configGlobal, 0,0
gauge01=btsRV7_configL!configLocal, 0,0
gauge02=btsRV7!propDrag, 0,0
gauge03=btsRV7!sim, 0,0
gauge04=btsRV7!digiFlightIIVS, 0,0,256,84
gauge05=btsRV7!pidController, 0,0
//gauge08=btsENG!control, 0,0,0,0PS.
Noticed there was no sound files in rv7A folder only config so took sound files and copied them from rv7 folder.
Several sound folders only include a config file, but copying wav files to these locations won't hurt.
Also noticed btsrv7configG is at the top of this list in this folder. Is this the right place?
Yes,
%\Microsoft Flight Simulator X\Gauges is the correct location.
btsRV7_configG is at the top of the list because it is a folder (contains XML script).