Missing ‘Load Query’ and ‘Save Query’ buttons in Suitelet

This is the first Scriptlet I’ve deployed.

I downloaded and deployed sql-query-tool.v20210316.suitelet.js today.

Launch from URL https://XXXXXXX.app.netsuite.com/app/site/hosting/scriptlet.nl?script=517&deploy=1

I am able to type in a Query in the ‘Query’ text box, select the ‘Run Query’ button, see the results and the ‘Export Results’ button.  I never get to the point I could ‘Save Query’ or ‘Load Query’.

I have saved the Query as .js under Documents > Files > SuiteScripts.

1. Could I be missing some files or steps?
2. It would be very helpful if detailed instructions how to install SuiteQL are available.
3. Are there any NetSuite queries available for download?