Many people have emailed about the software for this radio and indeed some I have sent via email and seems they are very well used. Please find enclosed a link to be able to find the software for your radio, hope that those who need it will help them. Also please find enclosed the link for the AT-6666 Software also. I know many are searching for this also.
And below for the CRT SS9900 Software:
So hope finally this will help those with the radio, and remember you can use the AT5555 cable directly to the board but be careful it is not the best way to do it. And remember without the content providers above there would be no file share of the software so a debt of gratitude goes to them.
Below is a bonus file: