Install IntelliJ IDEA as described in "Installing IntelliJ IDEA".
Vaadin Designer is compatible with IntelliJ IDEA 15 and later, both Community and Ultimate Editions.
To install Vaadin Designer in IntelliJ IDEA:
Open IntelliJ IDEA.
Choose IntelliJ IDEA > Preferences > Plugins in macOS, or File > Settings > Plugins in Windows and Linux.
Search for Vaadin Designer
Select Vaadin Designer and click
Restart IntelliJ IDEA to activate the plugin.
Follow these steps if you want to remove Vaadin Designer from your IntelliJ IDEA installation:
Go toin macOS, or in Windows and Linux.
Select Vaadin Designer from the list