Another, slightly more invasive thing to try while waiting for Colin:
Go to your user AppData folder (it’s normally a hidden directory) and go to the folder shown below. Delete the .plo file. Then try starting LayOut.
Another, slightly more invasive thing to try while waiting for Colin:
Go to your user AppData folder (it’s normally a hidden directory) and go to the folder shown below. Delete the .plo file. Then try starting LayOut.