Hi @Col,
Welcome to the Enpass Community.
To activate your Enpass Lifetime License and use it on other platforms, please complete the registration process as described below:
Click Activate Enpass at the bottom of the welcome screen.
Enter the e-mail you want to associate with Enpass and click Send Code to receive an activation code.
Enter the six-digit code sent to your e-mail, and click Confirm.
Click Done to complete the activation process.
After completing the activation process, you can use the premium license of Enpass on any device by registering Enpass with the same email address with which you purchased the license. You can do this by following these steps:
Open Enpass on your device --> Click on ‘Settings’ --> Click on ‘Account/Trial user, not registered (1st option of the settings)' --> Click on the email account and use the same email account to register with Enpass from which you purchased Enpass app and follow the instructions.
Also refer to this link: Creating a Master Password in Enpass.