|Filter configurations in closed projects
|Filter out configurations that are associated with a project that is currently closed
|Filters configuration in deleted or missing projects
|Filter out configurations that are associated with a project that has been deleted or are simply no longer available (not in the workspace, etc)
|Apply windows working set
|Applies the filtering from any working sets currently active to the visibility of configurations associated to resources in the active working sets. i.e. if project P has two configurations associated with it, but is not in the currently active working set, the configurations do not appear in the UI, much like P does not.
|Filter check configuration types
|Filter all configurations of the selected type regardless of the other filtering options. For example if you specify to filter Java type configurations, all Java type configurations will be filtered from the UI, not just ones that fall under the other filtering categories.
|Delete configurations when associated project is deleted
|Any launch configurations associated with a project being deleted will also be deleted if this option is enabled. Once deleted the configurations are not recoverable.
As Eclipse matures and new features are added to the launching framework, there sometimes exists the need to make changes to launch configurations. Some of these changes are made automatically, but those that are not (nonreversible ones) are left up to the end-user.
The migration section allows users to self-migrate any launch configurations that require it. Upon pressing the Migrate... button, if there are any configurations requiring migration, they are presented to the user, and the user can select the ones they want to migrate. Configuration migration is not un-doable.