I upgraded to the Premium plan but my alerts still expiring in 2 months

You can set up your alerts unexpired, so they won’t be automatically turned off when the timer expiration setting is reached. 

To set up unexpired alerts, follow these steps:
1. Open the Create/Edit alert window;
2. Click on Expiration section's button;

3. Click on the Open-ended option in appeared pop-up;

4. Save your alert.

NOTE! 

• Open-ended alerts are available for Premium and Ultimate plans only.

• Alerts are automatically deactivated if all of the following conditions are met:
  1. The alert was created more than one year ago;
  2. The alert hasn't triggered for over a year:
  3. The alert hasn't been edited for over a year.