[phenixbb] does the lastest Phenix only support windows 7

Hi All, I am a beginner of crystallography and I'd like to install Phenix. I tried to download phenix for my Windows 8.1 system (64bit) but in the download page it says "64-bit (Windows 7 only) ". I do not know if I really have to use Windows 7. Does anyone have experience of installation Phenix on Windows 8.1? Thanks ahead. Xiao