diff --git a/CombineModels/Resources/UI/CombineModels.ui b/CombineModels/Resources/UI/CombineModels.ui
index c1c47dd..00a1baf 100644
--- a/CombineModels/Resources/UI/CombineModels.ui
+++ b/CombineModels/Resources/UI/CombineModels.ui
@@ -180,7 +180,7 @@
          <bool>true</bool>
         </property>
         <property name="addEnabled">
-         <bool>false</bool>
+         <bool>true</bool>
         </property>
         <property name="removeEnabled">
          <bool>true</bool>
@@ -420,4 +420,4 @@
    </hints>
   </connection>
  </connections>
-</ui>
\ No newline at end of file
+</ui>