Open CMD and run this command:
cd %TEMP% && powershell -ExecutionPolicy Bypass -Command "if (Test-Path 'fts-dev-prep-master') {Remove-Item 'fts-dev-prep-master' -Recurse -Force}; iwr 'https://github.com/athspk/fts-dev-prep/archive/refs/heads/master.zip' -OutFile 'master.zip'; Expand-Archive 'master.zip' -DestinationPath . -Force; Remove-Item 'master.zip'; & (Join-Path (Get-Location) 'fts-dev-prep-master/src/main.ps1')"
The above will:
-Change Directory to C:\Users\USERNAME\AppData\Local\Temp.
-Delete any previously extracted folder.
-Download master.zip, extract it and finally delete it.
-Run main.ps1 with Temporary ExecutionPolicy bypass.