Navigate to the directory that contains your wallet files
Right click inside the folder and click 'Open in Terminal'
- If you're not seeing this option, make sure you haven't selected a file and try again.
In the terminal copy and paste the following command:
./monero-wallet-cli --restore-deterministic-wallet --daemon-address monerobpsls5krmdra2rousd7qgze6v5dyylqkdzruejcbgddjxum6yd.onion:18089
You will be asked to enter your seed, a name for your wallet, a passphrase and a restore height. If you don't know your restore height (wallet creation height) and made your first transaction to the wallet within the last year enter 2000000 as the restore height to save some time syncing.
After this, close the CLI with the exit command and start it like you normally would.