java helpset support in IDEA 19.1 plugin

Does IDEA 19.1 still support java helpset?

To be more specific does  <helpset file="help.jar" path="/HelpSet.hs"/> in plugin.xml trigger java help topics?

I have installed a plugin https://plugins.jetbrains.com/plugin/1800-database-navigator which has java helpset but clicking the help button is not showing any help.

Thanks.