On my system, it caches every time, just closing and reopening the DB window will cause the caching to start over. Plus the previews are horrible.
I hate using DB but put up with it because I can share materials between different host apps.

The Black Friday deals have been let down by Otoy's failure to deliver. To suggest that the deal should somehow not include the advertised (in the BF deal) KB3D content seems off. Otoys failure to communicate what is going on regarding this is even worse than not delivering what they advertised ...

After raising a support ticket to ask directly what was going on with kitbash3D, the response I got was to say that the next coupon is coming, OTOY knowing full well it was not.
That is lame! sigh....

I raised a support ticket and apparently the next coupon will be available soon

I expect this has finished with the changes to a subscription system at KB3D and their release of Cargo.
Not holding my breath for any more KB3D freebies and for me, the Cargo Pro subscription is on the expensive side of poor value.

Octane panoramic & universal camera set to equirectangular is not rendering correctly. The vertical angle is less than 180 and there are black bars top and bottom of the renders. In fact none of the 360 camera projections are rendering correctly in Cinema4D and do not render correctly sent to Octane ...

Doesn't work here either.
Just out of interest are you using a non AVX compatible CPU? My first thought was that might be why it is not running on my ancient 2012 MacPro (Windows 10)
Architron is compiled for an AVX system, even though it does not use AVX. I could not persuade Victor to recompile it ...

Ah that was silly of me. When I installed 2020.2 it popped up that a newer version was available so I installed it even though it was beta.
Your scene works with 2020.2 so I will retry the orbx files.

http://julius-ihle.de/?p=2451
https://github.com/julsVFX/osl/tree/main/jiWindowBox

It works great in Cinema 4D with both Octane and Redshift.
In Modo the output from OSL Texture will not connect to the Diffuse material Emission input (it does in C4d)
Also the Image Texture file node as no Browse ...

While I can easily use Julius Ihle's Windowbox OSL shader for Octane in Cinema 4D I cannot get it to work in Octane for Modo or Lightwave.
Exporting the shaders from C4D as Orbx is not working out either.