Please ignore the above post. I have version 5.28.93. 
What I would like to know is there any way of fudging it to connect to an IC7300?
Thanks in anticipation.
Nev
Yes, there is. You change the CI-V address in the icom 7300 to the one for an IC7700, then tell HRD you have an 7700. It is about a 95 percent solution. A few things on the front panel are redundant like there is only 1 antenna port not 2 etc, but it works quite well. Every thing else like WSJT-x and FLdigi must be told you have a 7700 also to expect the correct hex address of the 7700 instead of the 7300, but that is not a problem for them. I did this almost a year ago.