I had the same issue caused by some Windows 10 update but the work around now is: make sure JeVois is not connected (via USB), open AMCap and then connect JeVois. If you unplug JeVois while AMCap is running and connect JeVois back, it will error so will need to do my work around for it to work again. FYI, my machine also has the Windows 10 update from June 28th - 2017-06 Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4022716) & 2017-06 Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4022725).