Currently no .exe exists for 1.8.0b for Windows.
Can someone please update the project with this?
In the meantime for anyone else who needs to do it the manual old way:
https://github.com/RasPlex/OpenPHT/releases/download/v1.8.0.148-573b6d73/OpenPHT-1.8.0.148-573b6d73-windows-x86.exe
https://raw.githubusercontent.com/LibreELEC/LibreELEC.tv/master/packages/security/openssl/cert/cacert.pem
Download both, copy and replace the file in C:\Program Files (x86)\OpenPHT\system