'Events' seems to kill page access...

Hi folks,
When I activate 'Events+', access to pages suddenly result in a '404' error. Even the link to the home page. De-activate 'Events+' and access is normal again.
I have deactivated all plugins (except those the Theme requires, to test) and 'Events+' sure seems to be the one that causes this behavior.
I'd appreciate someone accessing the site - Support access already granted.
Thanks folks!
Hope to hear back from you soon.