Wow, that was unexpected.
I deleted both the JF_146.ini file and the StateSave.ini file from the WASM folder. I ended up deleting both because I forgot to when I started MSFS after the SU4 drop today, and when I applied AC power to the aircraft every single bell, whistle, and alarm started screaming at me, the wipers freaking out, the whole airplane was possessed. Scared the hell out of me because of the sudden onslaught of alarms and flashing lights. Oh, and the EFB had disappeared.
After deleting both and restarting the sim, I loaded in, set the EFB to LB, and just started up the APU and the FMS to see if there were any funky WASM errors happening. I hit End Flight shortly after getting her partially powered up, then loaded back in.
To my surprise, she was quiet from the outside, but on entering the aircraft proper I was greeted to the same light state, the APU running, the master switches all on, and pretty much everything how I left it except the FMS/Radar was off and the handful of things covered by the livery options Mark mentioned above. It even kept the EFB set to LB this time.
I was a doubter but so far so good for me.