How to swap/convert/claim M-BTC into Merlin_BTC in BTC/AA wallet (in 1:1 ratio):

Make sure you have enough gas in your AA wallet (Since AA wallets support MERL as gas, you only need 0.2 MERL to swap/convert/claim M-BTC, or a small amount of Merlin_BTC)
Visit the unstaking site https://merlinchain.io/unstake and connect your BTC wallet
Your M-BTC will shows up in "L2 Assets" tab
Navigate to "L2 Assets" tab and select M-BTC
Click "Claim" and confirm
Approve the spending if you haven't done it before and confirm to initiate the unstaking transaction
Sign the transaction in your BTC wallet
Your M-BTC will be converted to Merlin BTC in minutes to your AA wallet (Make sure you have imported the CA of M-BTC 0xB880fd278198bd590252621d4CD071b1842E9Bcd in your AA wallet)
You can check your unstaking history by clicking the "View Your Unstake History" located at the top right of the unstaking site

How to swap/convert/claim M-BTC into Merlin_BTC in EVM wallet (in 1:1 ratio):

Make sure you have enough gas in your EVM wallet (A small amount of Merlin BTC will do)
Visit the unstaking site https://merlinchain.io/unstake and connect your EVM wallet
Your M-BTC will shows up in "L2 Assets" tab
Navigate to "L2 Assets" tab and select M-BTC
Click "Claim" and confirm
Approve the spending if you haven't done it before and confirm to initiate the unstaking transaction
Review the transaction details carefully and sign the transaction in your EVM wallet if it's legit
Your M-BTC will be converted to Merlin BTC in minutes to your EVM wallet (Make sure you have imported the CA of M-BTC 0xB880fd278198bd590252621d4CD071b1842E9Bcd in your EVM wallet)
You can check your unstaking history by clicking the "View Your Unstake History" located at the top right of the unstaking site