Selecting Import Configuration from the system menu Administration Menu will take you straight into a file browser. Select the configuration file you wish to import, and continue. You will be taken to the Import Configuration form. At this point you can press Choose Files to change the configuration file you will import, or Upload to continue with the import.
After selecting the configuration file, a form will appear to enter a password to import encrypted fields. This is the password which was set during export. If no password is entered then no encrypted data will be imported.
When import is complete log messages in System Console will list which objects have been imported.