Q:

Use JetBrains Toolbox to get Early Access versions

I am using the Jetbrains Toolbox tool to auto-install updates to IntelliJ IDE. This works well for regular releases.
But how do I use this tool to obtain an Early Access pre-release? 
I see a hexagon-shape icon that displays a menu. But the menu items there say nothing about skipping ahead to a pre-release. The items there are only Settings, Roll back to…, and Uninstall. I checked the Settings display, but no options there to enroll in the Early Access program.

A:

Redundant product listing
Scroll down to the item at the bottom that redundantly lists your licensed product, IntelliJ IDEA Ultimate. 
Click the Install Again pop-up menu. Choose the pre-release version you want.

After download completes, you will see another product listing at the top of the app list.

