The post in question is right there in fact just a few replies above.
EDIT: Oh and the custom version of SpecialK ReShade is built on 3.0.8 I believe it was so it’s better to avoid for compatibility now that ReShade 4.0.0 or 4.5.0+ are recommended for shader compatibility or the newest stuff with early programmable shaders or compute shaders which needs 4.8.0+
So just go with the official version.
Could also just see how it works with HDR but I can’t imagine it working too well yet it’s going to need some of these upcoming changes to ReShade and then after that likely SpecialK and compatibility to utilize this too.
Wouldn’t want the results to be off or wrong from missing formats or the extended range HDR provides among other benefits after all.
EDIT: Also I missed the entire PC Gaming Wiki again and the existing guide but I think it’s going to be rewritten anyway or in the process of being so because a lot of HDR widget settings and options changed between 0.10.x and the 0.11.0.50 versions to this current build of 0.11.1.0
Or as it’s now labeled 2020.12.30 I believe is how it goes so it’s a compile date more than a version number at least. 
EDIT: Speaking of edits the latest 64-bit .dll file is found here.
32-bit .dll should be December 27th or December 28th I think?
Possibly either the Assassin’s Creed Valhalla topic, Cyberpunk topic or the D3D12 Feature topic.
Or somewhere in the last few posts by Kaldaien in the mega topic about a bit of everything.
There.
And the changelog would be this.
https://gitlab.special-k.info/Kaldaien/SpecialK/-/blob/0.11.liberated/CHANGELOG.txt
Plus parts of the above December 20+ notes from Kaldaien’s posts in addition to the code checked in on Gitlab here.
As a overview of what’s added/changed/fixed and so on.
EDIT: That’s a lovely little partial summary there too on how this works and what it does.
Ha ha.