Apache NetBeansBranding About Dialog
Read the thread Branding Help → About and see also Splash Screen and About Dialog Branding blog entry
Note: for LBL_Copyright, the email thread mentions modifying:
branding/core/core.jar/org/netbeans/core/startup/Bundle.propertiesThe second link shows the correct location:
branding/modules/org-netbeans-core.jar/org/netbeans/core/ui/Bundle.properties
