Guide on how to install Essentials from your desired place.
GitHub
To install Essentials from GitHub, please head to the official Essentials GitHub repository and do the following:
Click on the "Releases" tab on the right side of the page or click here
Go to the latest release version or the version you prefer
Scroll down until you see "Assets"
Download the Essentials.rbxm or Essentials-PreRelease.rbxm file
Place the file in the desired location on your system
Roblox Creator Marketplace
To install Essentials from the Roblox Creator Marketplace, the process is simple, head to the official marketplace asset item here and press on the "Get Model" button.