Unfortunately, there is no information released on the Internet that can assure you OmniForm Premium works with Windows 8.1 operating system. I recommend you send an email to the developer and ask him about OmniForm Premium requirements (the safest way to get right information). Moreover, if you have already purchased this application you don't need to buy it again, only if you need another copy of it. A single license key cost: 699.99 dollars.
