Note that the email address you have used to register here in the forums is not associated with any order as far as I can tell. You may need to look up your order number via Paddle Support. They can lookup your order number with your payment details.
We were able to find your life-time license purchase via your FileBot Forums email address. We have re-sent it to your email address. Please do not lose it again. It's a life-time license. Please do store it carefully because you may need it again in the future, possibly many years down the line.