Mission Editor - Attributes menu not working properly?

[-ami- mofo 13]

Hi,

 

I'm brand new to the eden mission editor and am making a co-op mission. When I click on ATTRIBUTES from the top menu and choose MULTIPLAYER I can't then choose any of the options in the drop down boxes of GAME TYPE and REVIVE.

 

The drop down lists appear but it's like all the choices are locked.

 

Any idea why this may be?

 

Thanks

 

EDIT - It seems that none of the drop down boxes are selectable from any of the top menus stuff. Has the new update today broken them?