Restart the BA Server. Once the server has restarted, you will see the visualization Example KPI registered in the list of Visualizations when creating an Analyzer report. Create a new report with the custom visualization selected. If you save the report and re-open it, and the visualization settings are remembered. Click on the XML link to view the report XML and visualization state JSON which is helpful in debugging state saving issues:
Test your visualization in the various browsers that will be used. You can add the XML text in the Report Definition dialogue box.