Bamboo doesn't accept license when its expired

Bamboo checks license expiry against the current date, instead of the release date for the Bamboo version:

    public boolean isMaintenanceExpired()
    {
        return maintenanceExpiryDate != null && maintenanceExpiryDate.compareTo(new Date()) < 0;
    }

Our license are meant to be perpetual, and customers should be able to run a Bamboo version if it was released before the expiry date!