Hello W4chr, the NCH Software licenses are not transferable over platforms, this means that if you purchase the license for your Android device you cannot use the same license on your Windows or Mac computer. When you purchased on your Android, iOS or using your Apple ID those licenses are limited to the devices linked to the account you used to purchase.
epat, If you have purchased the license for your Windows or Mac computer then you should be able to download the installer and make a copy of the installer file on a USB drive.