I have my Flex 6300 running and the software is using ports 4 and 5. Works fine on JT65 and HRD. I used to be able to connect my Yaesu FT991 and Icom 7300 using a usb connection that used serial ports 4 and 5. However now I can't. Is there a work around so that I can use my other two radios on digital modes without uninstalling the software for the Flex?