for what it's worth... I was able to "fix" this by moving the file:
"C:\Program Files\National Instruments\LabVIEW 20XX\user.lib\_dynamicpalette_dirs\OpenG\oglib_lvzip.mnu"
To here:
"C:\Program Files\National Instruments\LabVIEW 20XX\menus\Categories\OpenG\oglib_lvzip.mnu"
And restarting labVIEW
I upgraded this toolkit from the 4.2 version on the LavaG board. After doing so the palettes are gone. This is the case for both 2024 64-bit, and 2021 64-bit.
I see mnu files in the install directory, and it looks like the VIs are there, but the icon is gone from the OpenG palette.