Simply execute the installer package. You should get a few security prompts from Windows as the installer isn't signed; These are perfectly normal.
(If you're wondering why I don't sign installers, this article is a good read.)
The installer will tell you about this anyways, but LRR for Windows requires the Windows Subsystem for Linux to function properly.
Read the tutorial here to see how to enable WSL on your Windows 10 machine.
You don't need to install a distribution through the Windows Store, as that is handled by the LRR installer package.
Once the install completes properly, you'll be able to launch the GUI from the shortcut in your Start Menu:
Starting the GUI for the first time will prompt you to setup your content folder and the port you want the server to listen on. The main GUI is always available from your Taskbar.
Tray GUI and Settings Window
You can also decide whether to start the GUI alongside Windows, or start LRR alongside the GUI. Combining the two makes it so that LANraragi starts alongside Windows. 🔥🔥🔥