If I save my code generation options in a .launch and I try to delete one of the Generic Exporters, and then I open the file in a text editor to see if it actually deleted it, I see that it deleted the line that says:

<listEntry value="hbmtemplate1"/>

but it did not delete the this:

<mapAttribute key="org.hibernate.tools.exporters.hbmtemplate1.properties">
<mapEntry key="hibernatetool.something.toolclass" value="somepackage.SomeClass"/>
<mapEntry key="outputdir" value="/myapp/WebContent/Crud"/>
<mapEntry key="for_each" value="entity"/>
<mapEntry key="template_name" value="view/list.xhtml.ftl"/>
<mapEntry key="file_pattern" value="

List.xhtml"/>
<mapEntry key="hibernatetool.util.toolclass" value="org.hibernate.eclipse.launch.SeamUtil"/>
</mapAttribute>

This mapAttribute stuff stays there, and can only be removed if I do it manually.