The Public Test Branch (PTB) is a separate version of the software used for stress testing and gathering community feedback. Downloading the zip format allows for a "portable" installation that doesn't interfere with your primary setup. How to Install
Open the folder and execute the cbft.exe or main script file.
Use a tool like WinRAR or 7-Zip to unpack the files into a dedicated folder.
Scan QR code to download APP: SolarPortal