How To Update The Client - SWG-Source/swg-main GitHub Wiki
Instructions:
You can download the v3.0 client from here.
Unpack the zip wherever you'd like (You'll need 7-zip).
Double-click on UpdateSwgClient.bat to get the rest of the stuff you need.
That's it!
Double-click on UpdateSwgClient.bat again to get updates.
Add a shortcut to it on your desktop or start menu or whatever to make updates super easy!