Index: /trunk/src/org/openstreetmap/josm/gui/preferences/plugin/PluginPreferencesModel.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/preferences/plugin/PluginPreferencesModel.java	(revision 18024)
+++ /trunk/src/org/openstreetmap/josm/gui/preferences/plugin/PluginPreferencesModel.java	(revision 18025)
@@ -140,6 +140,5 @@
     public List<PluginInformation> getSelectedPlugins() {
         return availablePlugins.stream()
-                .filter(pi -> selectedPluginsMap.get(pi) != null)
-                .filter(selectedPluginsMap::get)
+                .filter(pi -> selectedPluginsMap.get(pi) == Boolean.TRUE)
                 .collect(Collectors.toList());
     }