The ICS Calendar Pro admin area has recently been reorganized into separate Utilities and Settings pages. This document has not yet been updated to reflect those changes. However, the features described here still exist, just in slightly different places than described here. All Authors, Editors and Administrators can access the Utilities page, but only Administrators can access the Settings page.
ICS Calendar Pro has a few site-wide configuration settings, along with some additional diagnostic tools, available under ICS Calendar > Settings & Tools in the WordPress admin.