I placed the Nimble Kick v1.0.4 VST3  file in my Audio/Plug-ins/VST3 Folder and Logic does not see it when scanning for new plug-ins. 

I then erased VST3 file and replaced it with Nimble Kick v 1.0.3 to see if it was related to compatibility issues. 

Neither of these are working. Any ideas?

If you mean this project, it has an active community where people in the know are more likely to be. This category is for questions about Itch.io proper.