You can connect to Mintr using MetaMask or one of two kinds of hardware wallets: Trezor and Ledger. To use Mintr with any of these kinds of wallets, you must sign a transaction giving permission for Mintr to interact with your wallet, which you will be asked to do when connecting your wallet.
For hardware wallets that store several wallet addresses, you can choose between the addresses when you connect. Alternatively, once you have chosen a wallet address you can swap to another one from the top-right drop-down in the menu.
If you have any more questions, please come join our community on Discord