By "explorers" I meant units in the recon line (wanderer, scout, guide, explorers). By the way, Explorer seems to require Advanced Diplomacy for some reason.
The problem is that in my previous test game every AI civ never built any hunting units, but lots and lots of Scouts, like tens of them. Even prioritize them over buildings. No need to say it performs pathetically, even with a big bonus against animals.
I've attempted to look a bit at the AI code, among other things I saw that the AI should always try to build at least 1 hunter unit. So I thought it could be caused by the AI still considering Scouts as good hunting units (in core it's true, in this modmod they won't do a thing to animals) due to them having a hunter combat class and/or a hunter unitAI. That's why I removed both from every unit in the recon line. I've started a new game with those changes, but unfortunately I can't make the world builder work so this time I don't know how the AI is doing yet (mid-Prehistoric).
Anyway, if you have some ideas on what could be causing this and how to fix it, I'd be glad to have your thoughts on the matter.
When I click it just recenters the map, I can't add units or edit cities... and when I quit WB, the WB icons stay on the top-left over the normal icons.
Both games I've started have been some of the better maps I've had with PM in awhile, go figure! 
