I bought it from the Play store. I then got the ImperiHome Pro APK from my Android device and loaded it in to Arc Welder on the PC. However there is obviously an issue with the paths / location, as the Free app looks to see if the Pro app is present and if it is, then you get the Pro features etc. But this isn't working on the PC, so you can only run the Free Lite version which is no good. So will have to use AuthomationHD on the PC instead.