To download the Update Service Client, click here (login required) and run the installer (ls-central-latest.exe).
Tip: Note that using the Update Service Client to install the Hardware Station is the easiest and fastest way to keep the Hardware Station up-to-date, but it will not give you control over when the Hardware Station should be updated on each POS.
Setting up your own Update Service server and creating your own installer for the Hardware Station will give you more flexibility controlling the updates by using Deployment circles. The same applies to the AppShell for LS Central.
See also
How to set up Update Service server
How to create a POS bundle, an installer, and device rollouts with circles