Thanks for the list, dumorian 
Now i can see why it’s so confusing,.
it looks like the beta version IS coming with additional content which is strange.
the key files you need for Carrara 8 are….
C8_NativeContent_8.0.0.4_Mac.zip - mac (download)
C8_NativeContent_8.0.0.4_Win.exe - pc (download)
Carrara_8.1.1.12_Mac32_i386.zip - mac (download)
Carrara_8.1.1.12_Mac32_ppc.zip - mac (download)
Carrara_8.1.1.12_Mac64.zip - mac (download)
Carrara_8.1.1.12_Win32.exe - pc (download)
depending on your system and Mac OS version.
for the beta of 8.5, the files you need are…
Carrara_8.5.0.132_Mac32_i386.zip - mac (download)
Carrara_8.5.0.132_Mac64.zip - mac (download)
Carrara_8.5.0.132_Win32.exe - pc (download)
Carrara_8.5.0.132_Win64.exe - pc (download)
The After effects download look like it’s been named incorrectly….
C8_After_Effects_Plugin_2.0.2.231_Win.zip - mac (download)
the “Win.zip” part of this suggests that it’s for PC, and NOT mac.
It also looks like the 8.5 beta , and render node, are listed twice,. and there’s No render node listing for the C8.1.1.12 version
at least it gives the Daz3D staff something to do on Monday 
As for the Bonus content,. .. there’s no difference in the versions for C8 or the beta, so you can download the V4 / M4 stuff, and the carrara High res shaders for those figures,. plus Digital painters brushes samplers, and Howies snow scene etc..
Any Daz figures, clothing, and the Powerloaders ... should be installed to either a Poser Runtime (no need for the powerloaders in poser) or into your Daz Studio / my library,.. which is the only program where the powerloaders will work.
All the other Carrara specific files should be installed into the same folder where you install Carrara.
you only need to install the Render Node, if you’re using a network of computers to render.
you only need the AE plugin if you’re using After effects. and it should be added to your Adobe After effects Plugins folder.
also,. multi-pass rendering and compositing in AE is probably a better option.
The BETA of C8.5 MUST be installed into a separate New folder EG: Daz3D/Carrara_beta.
Hope it helps 