Download the 7z or zip archive and follow the instructions to setup
https://github.com/Moehammered/switch-remote-play/blob/master/instructions/Instructions.md
(Instructions have been updated with extra troubleshooting information related to automatic network discovery)
- Added extra options in the Controller Configuration Menu
- Left mouse button can be mapped to any of the Switch shoulder buttons
- Right mouse button can be mapped to any of the Switch shoulder buttons
Now you can pretty much control the PC doing simple tasks with just the left or right joy-con alone!