Event + activation error

After installing Event+ I played around for a few minutes. Then I discovered my front page layout had brooken.
Not sure if the plugin is related but I had my host restore from a backup. Then I went through whole thing again and same thing happened. But this time after restore the plugin won't activate. I tried delete and re-install but the activation do still not get through.
I have granted access.
Maybe I am doing something wrong with settings. So I would appreciate if you can setup a simple non-paid event so I can confirm that does not break site .