Steps:
1. Assign the Pro seat to a user
2. Launch Editor
3. Activate editor with received serial key
4. Close the editor
5. Remove a seat from a user
6. Launch editor
7. Attempt to activate editor with the same serial key as before
8. Observe error that serial key is expired
9. Expiration date is 2017-02-06
10. Expected: 2017-02-07 (this was the actual date when seat was removed)

Editor: 5.6.0b7, 2017.1.0f1