- Open FlexSim Software.
- Click Help in the main menu.
- Choose License Activation.

- Click the Return tab.
- Each of your activated licenses will be listed in the dropdown selector. Select a license you want to return.
- Click the Return button.
- Please wait while your FlexSim Software communicates with the license server. The status text will update, and should end with an indication of success.

- Repeat to return any other Activation IDs that need to be returned.