HOORAH!!!
They said it couldnt be done! But I did it!
After ages trying over the years I've FINALLY found out how to get Atari Files to be read on the PC.
Its possible using two separate programs - the first is WFDCopy which allows your PC to read Atari formated disks via a USB Floppy Drive and then save them as ST (Atari) Disk Images to your PC.
The second part of the puzzle is to then use a program called MSA which allows you to read the saved ST Disk Images youve just saved and (heres the great part!) to 'explore the contents of them - which then in turn allows you to save the individual files (in my case the files being Cubase .arr files.)
Both these programs are relatively very old now but are still available online as freeware. I EVENTUALLY managed to track them both down and am going to post the links here - although there is a good possibilty that moderators here will take those links down.
If they do then you can fire me a direct message and I'll fill you in
Download WFDCopy 1.03 from here:
http://ftp.heanet.ie/mirrors/sourceforge/w/project/wf/wfdcopy/OldFiles/
Download MSA 2.1 from here:
http://msaconverter.free.fr/index-uk.html
Both programs are relatively easy to navigate around and have instructions in the zipped folder.
What bugs the sh!t out of me is that it should take so long for me to finally figure this out - and how much bad advice I have had to endure over the past 7+ years to do so...
HOORAH!