First time Installation
For any version of HueForge, installation is just unzipping it into a directory where you have write permissions. You can use Desktop, Documents or you can create a new folder C:\Programs\ and unzip into there. You cannot unzip into C:\Program Files or C:\Program Files x86 and some people have issues with the Downloads folder.
Depending on your system, you may need to run "VC_redist.x64.exe" in the Microsoft Redistributables folder (if you get DLL errors at runtime)
If HueForge is working well for you, then an upgrade should be simple. Given that this is still early access software, I personally recommend keeping the old version in case something I've done in the new version totally breaks your old files. Wherever you were saving Project files, the new version should see and use by default (and it should take your window layouts too). But if you have added your own custom filaments and/or set a bunch of prefilled filaments as owned, you will want to move that over to the new version. Simply go to your old install folder and into the Filaments directory.
Copy personal_library.json and replace it in the Filaments directory of your new version. To ensure that there aren't any conflicts, move unowned_library.json into the Community Libraries folder and then start HueForge. Your filaments should be updated.
I stopped distributing HotFixes because people were getting confused and trying to run the hotfix by itself. But if you know what you are doing and want to upgrade from v0.6.x -> v0.6.4 without having to have 2 directories OR overwriting your filaments, the only files that you need out of the new installer are HueForge.exe and the two new Vendor Libraries under Filaments/Vendor Libraries. These two libraries are Kexcelled and Protopasta. Simply copy them into the same places (feel free to backup HueForge.exe first) in your original install and you will be updated.