Your Master Password is the private key used to encrypt all of your data saved in Dashlane. Please remember to make your Master Password as strong as possible, and to not share it with anyone else.
You need to be signed in and have a working Internet connection to change your Master Password. This can only be done on your desktop application, either on Windows or on macOS.
Free users, or users with automatic sync disabled, should remember that when they change their Master Password, they will lose access to the Dashlane data on any other devices they use. To change your Master Password without losing that data, you should first make Dashlane secure archives of the data on those devices. Then, once you have changed your Master Password, note that you will use the old password one last time to open the secure archives and reimport your data on each device.
Changing your Master Password on Windows
Log in to the Dashlane application with your Master Password first and make sure that you have a working Internet connection.
Then, on the top menu of your Dashlane application, go to Tools > Preferences > Account and click on Change. You will then be prompted to enter your current Master Password, and then your new Master Password.
Changing your Master Password on macOS
Log in to the Dashlane application with your Master Password first and make sure that you have a working Internet connection.
Then go to Dashlane > Preferences > Account and click on Change. You will then be prompted to enter your current Master Password, and then your new Master Password.