We've just released JFormDesigner 7.0.3 with Java 15 support, IntelliJ IDEA 2020.3 support and some bug fixes.
This release includes also a brand new mechanism for look and feel switching, which now works much better (and faster). Especially in IntelliJ IDEA and NetBeans.
Users of the IntelliJ IDEA and NetBeans plug-ins are recommended to update to 7.0.3.
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