Virtual Boy Go new slowdown incorrect aspect ratio as of Quest 3 2.1.1 update?

Just a few weeks ago I was using Virtual Boy Go on my Quest 3, with no visual anomalies, and no discernable performance difference between the emulator and Red Viper on a New 3DS, or an original Virtual Boy, or a Switch 2. As of today, I turned on my headset, was told that the software had been updated, and then when I launched VBG, I was greeted with the wrong aspect ratio (it's way too tall) and noticeable slowdown--it's roughly 30% slower.

Has anyone else experienced this, or does anyone know how to contact the developer of Virtual Boy Go?