If for any reason you lose your seed phrase, you can view it again by opening the wallet and selecting "Wallet | Seed" from the top menu. You will be prompted to enter your encryption passphrase if there is one.
To change an existing password or create one if you didn't during the initial setup, select "Wallet | Password" from the top menu.
You can access private key controls by selecting "Wallet | Private keys" from the top menu.
Entering one or more private keys, you can sweep all funds they contain into any public address of your choosing.
This option will display the private keys for your public addresses and allow you to save them as a .json or .csv file type.