Reactivation is required under the following circumstances:

The Maintenance & Support Plan (MSP) has been renewed.

The maximum number of Reliability Event Cycles has been increased.

You've migrated to a different ExtendSim product (e.g. from DE to Pro).

The license is being upgraded to a newer release of ExtendSim (e.g. from release 10 to release 11).

DO NOT reactivate ExtendSim if you are merely updating to an incremental release of ExtendSim (e.g. from 10.x to 10.y).

For complete details on reactivating, see the document titled Reactivating • Individual Licenses.