[Blind-sysadmins] JFW dongle with Windows 8.1 - USB issues

Hi, Has anyone else seen USB issues with JFW (using 8.1 here with JFW 15) authorised by a dongle? I am finding that USB devices I plug into the system don't appear until I restart JFW. This means that I nearly bricked a phone today when doing an update, as the system couldn't find the phone after it rebooted. I did email FS some time ago on this and got nothing back whatsoever, so wondering if anyone else found this? If I remove the dongle, reboot the system and run JFW in demo mode, everything is fab. Thanks. Andrew.