This option is available if you enabled the Organize&Search feature package
1. Open the Desktop.com app
2. Start from unlocking your Vault. Enter your Desktop.com account password -> click the Unlock Password Manager
3. If you enabled Organize&Search + Communication feature, navigate to the Desktops -> select the Vault to unlock that
4. Click the Add password button
5. Switch to the Import tab and click the Browse your computer button to upload a file with saved credentials
6. After you've selected the file, click the Upload your file button