diff --git a/Ridges_3/demo/Ridges_3/README b/Ridges_3/demo/Ridges_3/README
index 0cbdfd1df27..9454717f62a 100644
--- a/Ridges_3/demo/Ridges_3/README
+++ b/Ridges_3/demo/Ridges_3/README
@@ -8,9 +8,5 @@ takes as input
 
 it displays an OpenGL view of both the mesh and the ridge lines
 
-./introspect-qt.exe ../../examples/Ridges_3/data/ellipe0.003.off ../../examples/Ridges_3/data_ellipe0.003.off.4ogl.txt
-
-
-./introspect-qt.exe ../../examples/Ridges_3/data/poly2x^2+y^2-0.062500.off ../../examples/Ridges_3/data_poly2x^2+y^2-0.062500.off.4ogl.txt
-
+ ../../demo/Ridges_3/ridges_viewer data/poly2x^2+y^2-0.062500.off  data/data_poly2x^2+y^2-0.062500.offRIDGES-d4-m4-t3-a4-p0.4ogl.txt 0 0
 
diff --git a/Ridges_3/demo/Ridges_3/makefile b/Ridges_3/demo/Ridges_3/makefile
index 7402e0068e2..e5e08960e8e 100644
--- a/Ridges_3/demo/Ridges_3/makefile
+++ b/Ridges_3/demo/Ridges_3/makefile
@@ -42,7 +42,7 @@ INTRO_LD_FLAGS= -L$(INTROSPEC_DIR) -lIntrospect -lglut
 all:	visu
 
 visu: 	SketchSample$(OBJ_EXT) visu$(OBJ_EXT) 
-	$(CGAL_CXX) $(LIBPATH) $(EXE_OPT)introspect-qt$(EXE_EXT) \
+	$(CGAL_CXX) $(LIBPATH) $(EXE_OPT)ridges_viewer$(EXE_EXT) \
 	SketchSample$(OBJ_EXT) visu$(OBJ_EXT) \
 	$(LDFLAGS) $(INTRO_LD_FLAGS)
 
diff --git a/Ridges_3/examples/Ridges_3/README b/Ridges_3/examples/Ridges_3/README
index 44badf2538a..3d69136c5eb 100644
--- a/Ridges_3/examples/Ridges_3/README
+++ b/Ridges_3/examples/Ridges_3/README
@@ -6,7 +6,7 @@ it computes a jet fitting to set the monge data at each vertex
 
 it outputs the results in :
 1. filename.offRIDGES-d?-m?-t?-a?-p?.4ogl.txt  which can be visualized with 
-	the demo program introspect-qt
+	the demo program ridges_viewer.exe
 2. if option -vtrue, filename.offRIDGES-d?-m?-t?-a?-p?.verb.txt contains human readable results
 
 
@@ -49,8 +49,9 @@ Note : if the nb of collected points is less than the required min number of
  
 EXAMPLES
 ---------------------------------------------------------
-./Compute_Ridges_Umbilics -f data/ellipsoid_u_0.02.off -d4 -m4 -a3 -t3 -v0
+./Compute_Ridges_Umbilics -f data/poly2x^2+y^2-0.062500.off -d4 -m4 -a4 -t3 -v0 
 
 visu with:
 
- ../../demo/Ridges_3/introspect-qt data/ellipsoid_u_0.02.off data/data_ellipsoid_u_0.02.offRIDGES-d4-m4-t4-a3-p0.4ogl.txt 0 0
+ ../../demo/Ridges_3/ridges_viewer data/poly2x^2+y^2-0.062500.off  data/data_poly2x^2+y^2-0.062500.offRIDGES-d4-m4-t3-a4-p0.4ogl.txt 0 0
+