How to access an existing wallet?
When you launch Tonkeeper for the first time, you will be offered two options: connect an existing wallet or create a new wallet.
By choosing 'Import Existing Wallet', you can select from various methods:
Select 'Existing wallet', enter your secret key, and then set a PIN code, which will be required for transaction confirmations.
Finish the wallet setup, and you're all set! Cheers!