Launch Aspire (if it's not already running). See:
To add a Publish to File drag from the Publish to File rule from the Workflow Library and drop to the Workflow Tree where you want to add it. This will automatically open the Publish to File window for the configuration of the publisher.
In the Publish to File window, specify the connection information to publish to the log file.
Name: Enter the name of the publisher. (This name must be unique).
Once you've clicked on the Add button, it will take a moment for Aspire to download all of the necessary components (the Jar files) from the Maven repository and load them into Aspire. Once that's done, the publisher will appear in the Workflow Tree.
For details on using the Workflow section, please refer to Workflow introduction.