I have Raspberry Pi 2 Model B v1.1. (Noobs 1.4.1 Raspbian loaded)
On The Pi Store, I registered myself then tried to download WebIOPi. But after the clicking on download button, it said that wait for 5 seconds for PayPal page to load. But, nothing responsed to me to download WebIOPi. So, download didn't start. By the way, why a free package as WebIOPi needs Paypal page to pay something? It is free of charge as mentioned on the store.