I discovered an issue and a workaround for connecting between the ARC software and the arduino (running on Windows 7). To reproduce: 1 - Get successfully connected to the Argentum 2 - While connected (button says disconnet), pull the USB cable and plug it back in. 3 - I can now press disconnect, but I can't reconnect. The only way I can get reconnected is to make sure that I plug in the USB cable while the button says connect, and then I can press connect and get connected. If I plug the USB cable in when it says disconnect, I have to click disconnect (so the button says connect) and then unplug and replug the USB cable in order to connect. The workaround is to make sure that the button says connect when I plug the USB cable in.