Resetting Multiplayer Customisations/Rules

[amarden]

I've been running a multiplayer game for a while now, and - having reached 1 AD, found that I'd run out of things to research. I discovered that the 'Rules' that you can define at the start of a multiplayer game had inadvertantly had the Max research age set to Ancient. I can't seem to change it so that we can continue the game without the limitation.

Does anyone know if there's a way to change this once a game has started?

Cheers

Andy