[Plugin: Events Manager] Problems with Groups Links

I’m getting some mistakes using this plugin. To be ecxatelly, see:
my structure of groups is grupos not groups

so, when I’m trying to open the page (url)
http://redecandanga.com/groups/audiovisual/events/
has a mistake… will be
http://redecandanga.com/grupos/audiovisual/events/

How to solve ?? No problem to edit scripts, but better will be to know where is the code place…
any help?

http://wordpress.org/extend/plugins/events-manager/