On the Settings Tab, there are two toolbars: License Manager, discussed below, and Analytics, discussed in Settings Tab: Analytics Tools. 

When you click on License Manager, you see three options:

License Manager

• License Manager allows you to Re-activate a license that you previously removed, Remove a license from this computer, or Delete an expired license.

Remove License

Removes the license from this installation of PlanSwift and returns the license to the licensing server so it can be used again. You'll see this

If you click OK, your license is returned to the cloud server:

However, you can go back into License Manager and reactivate it:

Re-enter Activation Code

Allows you to enter in new credentials to obtain a license: