The footer lines actually should not be deleted for copyright reasons I guess.
Here is a fix for the Admin preferences not saving.
[here]

alternate method
Copy footer 1 and footer 3 to a text file for later use
Delete footer 1 and footer 3, then save
Replace all single quotes in footer 1 text with double quotes and put back in footer 1, then save
Replace all single quotes in footer 3 text with double quotes and put back in footer 3, then save

mikem