I installed 5.0.1 on both mac and windows
I searched on google.
I looked at the plugins
I looked for any preference
I searched this list
The text of your question does not contain a product name (or a question).
But it sounds like you're looking for iReport Professional and JR Pro or JRS Pro. You can get iReport Pro for a 30 day evaluation here:
The ultimate iReport guide does not say anything about iReport Professional or JR Pro being required to work with html5 charts in iReport 5+. Either the document is inaccurate or this is a bug. Can someone please clarify this? My company does not want to pay for a professional license if it does not have to. I would have posted this as a comment but the system is preventing my account from being able to do so.