Not sure why but I keep receiving this message when I try to run the PetroWallet file "This app can't run on your PC". I currently have Windows 10 installed on my PC.
I'm on a Mac, so i wouldn't know. But have you tried the "universal app"? I suppose that's for Windows?
i think the "Universal Client" is a Web Client.
if your PC is 32bits or you're having problems, try with the "Universal Client".