Please make sure that you use the version 2.5.0 of the plugin. If not please backup your website completely and go to Plugins menu and click on update now where you see the ME Calendar listed.
The other point is that you can add a new page and use the Cornerstone to add a Raw Element and use the MEC shortcodes to add the daily view. To know what to add a shortcode you need to go to M.E. Calendar > Shortcodes menu and copy the shortcode of the Daily View:
It is [MEC id="449"] for my case, your case may have a different ID.
I suggest that you also check our documentation:
And their official documentation: