I have the 64bit version of dexed working on my Sonar Platinum 2017.8 EA. The DLL file itself is 2,612,736 bytes in size and is located in my VST folder
The patches themselves are in the following folder:
%USERPROFILE%\AppData\Roaming\DigitalSuburban\Dexed
This folder also contains a file called Dexed.xml which is basically a text file that contains some parameters
The zip file that you download contains both the 32bit and the 64bit dlls.
The latest version can downloaded from here
http://asb2m10.github.io/dexed/ Hope this helps