When I read your email I went to Device manager – Ports (Com & LPT) to get the driver info and noticed only Com 3 and 4 were listed. I now have a separate USB cable for each radio (both connected). I do not recall the Windows 10 computer telling me it was installing drivers when I connected the 7300 to the computer via a second USB cable. I chose Com 5 for the IC-7300 in the HRD connect screen. Com 3 is used for data and Com 4 for PTT. The FTDX-3000 only requires one USB cable and has 2 com ports according to instruction sheets. My drivers are the same date and version as yours.
Set the following menu items under MENU>SET>Connectors. These are the changes, leave everything else to default settings. Step three, setup the Icom 7300 using the radio’s menu.
Do not connect the USB cable until you have downloaded and installed the driver. Step one, if you haven’t already, download and install the latest USB driver from Icom for your Icom IC-7300. If you just want to use a USB Cable with HRD and operate some PSK31 or RTTY (AFSK), take a look at this video. I have found this to be the easiest, because later on I added cw keying and RTTY (FSK) to the mix. Use the CI-V for rig control and the USB for the soundcard. One is the USB cable connected to the radios USB port and the other is a CI-V cable connected to the radios CI-V port. UPDATE: New article using the Icom 7300 with Ham Radio Deluxe v6.5 Icom 7300 Ham Radio Deluxe Setup So if you’re interested in the “swiss army knife of ham radio” and using it with the Icom 7300, you’re in the right place.