Just an update for future readers, the SD card was recovered. I booted into Ubuntu live and using the GUI I managed to format to FAT, allowing me to use it in Windows again. It didn't want to format straight away, ant it didn't want to delete the partition, because of some error. By converting the v...

Not wanting to start a new thread, as issue is related to this thread, so a reply instead: For me, even a format with the SDFormatter v4 doesn't work. Even with FORMAT SIZE ADJUSTMENT ON it doesn't recuperate the space. Tried with Win7 and EaseUs Partition Master as well, with no luck. Card stays on...