If you only want to use the Stable Diffusion UI, you've downloaded the wrong file. In that case, please download and follow the instructions at https://github.com/cmdr2/stable-diffusion-ui#installation
This is in-flux, but one way to get a development environment running for editing the UI of this project is:
(swap `.sh` or `.bat` in instructions depending on your environment, and be sure to adjust any paths to match where you're working)
1) `git clone` the repository, e.g. to `/projects/stable-diffusion-ui-repo`
2) Download the pre-built end user archive from the link on github, and extract it, e.g. to `/projects/stable-diffusion-ui-archive`
3) `cd /projects/stable-diffusion-ui-archive` and run the script to set up and start the project, e.g. `start.sh`
4) Check you can view and generate images on `localhost:9000`
5) Close the server, and edit `/projects/stable-diffusion-ui-archive/scripts/on_env_start.sh`
6) Comment out the line near the bottom that copies the `files/ui` folder, e.g. `cp -Rf sd-ui-files/ui ui` for `.sh` or `@xcopy sd-ui-files\ui ui /s /i /Y` for `.bat`
7) Delete the current `ui` folder at `/projects/stable-diffusion-ui-archive/ui`
8) Now make a symlink between the repository clone (where you will be making changes) and this archive (where you will be running stable diffusion):
