How to turn off Advanced Fog of War

I'm adjusting my map for this evening's session, and I had it just like I wanted it - until I accidentally turned on Advanced Fog of War.  It's a cool feature that I want to learn how to use in the future, but I don't have time for it right now and want to just use regular Fog of War, but I don't see any way to turn it off once it's been turned on, or any way to switch to regular Fog of War. How do I fix this? 

It's on the main tab of the page settings. <a href="https://roll20.zendesk.com/hc/en-us/articles/360037774493-Advanced-Fog-of-War#AdvancedFogofWar-EnablingAdvancedFogofWar" rel="nofollow">https://roll20.zendesk.com/hc/en-us/articles/360037774493-Advanced-Fog-of-War#AdvancedFogofWar-EnablingAdvancedFogofWar</a>

I found that box before, but when I unchecked it, nothing changed. I ended up having to remake my entire map. Still, I want to get to the bottom of this in case it ever happens again.&nbsp;

Did you maybe have UDL on for that map? That would be "Explorer Mode" in the Updated lighting settings - same thing as AFoW, only for the new lighting system.