... I am losing the plot!
I know I have formatted my Class 10, 64GB, SD card on the computer via USB reader. Unfortunately, or fortunately, I have 2 desktops and 2 laptops in home and office and all have different uses and prog's on.
I've been scouring through them and the study PC has Mini Tool Partition Wizard on it which sounds familiar. I just Googled it and found the link...
MiniTool Partition Wizard Home Edition
It looks familiar... but there again, so did SD Formatter! I think I've only ever used it the once to change to ExFAT32 to solve a problem. Will continue scouring.