The [Iceman fork/repo](https://github.com/RfidResearchGroup/proxmark3) has more powerful functions like offline sniff. These guys even developed a new hardware called Proxmark3 RDV4 with smart card support. But the official repo and the Iceman repo is not fully compatible.
This GUI was designed for only official repo at first, but I'm trying to make it compatible with Iceman repo.
A cool guy [Gator96100](https://github.com/Gator96100) creates [ProxSpace](https://github.com/Gator96100/ProxSpace) and makes it possible to compile both the firmware and client on Windows.
Also, he makes the [pre-compiled Windows client](http://www.proxmark.org/forum/viewtopic.php?id=3975) so you can download it and run your PM3 client on Windows instantly.
I included his compiled client in my releases so you can use the GUI on the fly, and you can also use the GUI with your prefered client.