I'm still on Windows 7 64 bit.
Just now deinstalled CorelDraw X4.
Then installed CorelDraw GS 2019.
All my CorelDraw files now appear with extension .cdr. No icon.
'Hide/Show Extension' makes no difference.
However, the files open and save perfectly.
But, there is no 'Open with' option when you right click on a file, so I can't associate the files with CorelDraw GS 2019 to get an icon.
Try a Repair of your suite installation.Run the setup program and choose "Repair" and see if it fixes itself.
Thanks Ronnie. I fixed it by going into the properties of one of the .cdr files and clicking on the ‘open with’ option in there.
Thanks for your suggestion.