SeaDAS Startup Page - seadas/seadas-toolbox GitHub Wiki
The startup page can be customized by using NetBeans' branding feature.
Some advice at: https://stackoverflow.com/questions/27686524/netbeans-plattform-branding-doesnt-work-on-created-installer
Tutorial for creating a branding module: https://platform.netbeans.org/tutorials/nbm-wizard.html