Sometimes your external wallet provider can change your Bitcoin Address, or you might want to change it yourself. If you lose access to your wallet and you want to create a new one, you need to contact your wallet provider.
Some things you need to know:
Before you change your address, we suggest you keep on mining until you reach the minimum payout threshold and switch to your new address after you have confirmed the funds on your old address.
Also note that all mining earnings are saved on bitcoin address, assigned to your miner.