Bug 85506 [Import/Export] [Preferences] import preference wizard uses a "save" dialog.
I20050215-2300 The import preferences wizard provides a browse button to select the file you wish to import from. However, it creates a Save As dialog. When you select the file you wish to import you are greeted with a warning that the file will be overwritten. No such thing occurrs, and otherwise the import succeeds.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/preferences/WizardPreferencesPage.java
public boolean finish() {
        
        saveWidgetValues();
        IPreferenceFilter[] transfers = null;
        if (getTransferAll()) {
            
            transfers = new IPreferenceFilter[1];
            
             
            
            transfers[0] = new IPreferenceFilter() {
                public String[] getScopes() {
                    return new String[] { InstanceScope.SCOPE,
                            ConfigurationScope.SCOPE };
                }
                public Map getMapping(String scope) {
                    return null;
                }
            };
        } else {
            transfers = getFilters();
        }
		boolean success = transfer(transfers);
		
		if (success) {
			saveWidgetValues();
    }
		return success;
	}
    /**