The 'About PerfectIt' dialog shows what version of PerfectIt you have installed, your license expiry date, and what your license key activates.

Your license key will activate one or more of the following items:

PerfectIt 6 Trial You haven’t registered PerfectIt yet. You have access to PerfectIt’s core functionality for a limited time. You do not have access to restricted styles.
PerfectIt 6 You have access to PerfectIt’s core functionality. This does not include restricted styles.
PerfectIt for PowerPoint You have access to the PerfectIt for PowerPoint add-in
Formatting Checks You have access to PerfectIt 6's expanded Formatting Checks
The Chicago Manual of Style You have access to The Chicago Manual of Style for PerfectIt.

How do I find out if PerfectIt for Word (Windows)is registered?