Hi,
mine appears to be okay. Did you do the disk check before you actually loaded the update to make sure your disks were okay? I also noticed you were upgrading from 1.3. Did you install the two 1.4 disks first then the two 1.5.

They had to be installed correctly , or I suppose you could end up with problems.

I know that one other chap had a problem too. His first disk worked okay but the second one didn't ( it was faulty) Apparently he downloaded the software from the site onto a new disk, and fortunately this time it worked.

best wishes
Rikki
_________________________
best wishes
Rikki 🧸

Korg PA5X 88 note
SX900
Band in a Box 2022