diff --git a/common/cace_datasheet_upload.py b/common/cace_datasheet_upload.py
index 95469b1..378dde9 100755
--- a/common/cace_datasheet_upload.py
+++ b/common/cace_datasheet_upload.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3 -B
+#!/usr/bin/env python3 -B
 #
 # cace_datasheet_upload.py
 #
diff --git a/common/cace_design_upload.py b/common/cace_design_upload.py
index 08bdfa2..a783455 100755
--- a/common/cace_design_upload.py
+++ b/common/cace_design_upload.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 # cace_design_upload.py
 #
diff --git a/common/cace_gensim.py b/common/cace_gensim.py
index 76afb4b..be9007d 100755
--- a/common/cace_gensim.py
+++ b/common/cace_gensim.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 """
 cace_gensim.py
 This is the main part of the automatic characterization engine.  It takes
diff --git a/common/cace_launch.py b/common/cace_launch.py
index 2867819..8a17626 100755
--- a/common/cace_launch.py
+++ b/common/cace_launch.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 """
 cace_launch.py
 A simple script that pulls in a JSON file and uses the hash key to find the
diff --git a/common/cace_makeplot.py b/common/cace_makeplot.py
index 75611b3..76eb649 100755
--- a/common/cace_makeplot.py
+++ b/common/cace_makeplot.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 """
 cace_makeplot.py
 Plot routines for CACE using matplotlib
diff --git a/common/consoletext.py b/common/consoletext.py
index 820d465..8d462f3 100755
--- a/common/consoletext.py
+++ b/common/consoletext.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #--------------------------------------------------------
 """
diff --git a/common/editparam.py b/common/editparam.py
index 30a9d06..06992a6 100755
--- a/common/editparam.py
+++ b/common/editparam.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #-----------------------------------------------------------
 # Parameter editing for the Open Galaxy characterization tool
diff --git a/common/failreport.py b/common/failreport.py
index 7a1159b..54c2ce9 100755
--- a/common/failreport.py
+++ b/common/failreport.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #--------------------------------------------------------------------
 # Characterization Report Window for the Open Galaxy project manager
diff --git a/common/foundry_nodes.py b/common/foundry_nodes.py
index b431eff..fba9132 100755
--- a/common/foundry_nodes.py
+++ b/common/foundry_nodes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 # foundry_nodes.py ---
 #
diff --git a/common/helpwindow.py b/common/helpwindow.py
index 1f0e1a8..176e1b0 100755
--- a/common/helpwindow.py
+++ b/common/helpwindow.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #--------------------------------------------------------
 # Help Window for the Open Galaxy project manager
diff --git a/common/listboxchoice.py b/common/listboxchoice.py
index df6b895..4b99277 100755
--- a/common/listboxchoice.py
+++ b/common/listboxchoice.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 # Simple listbox with scrollbar and select button
 
diff --git a/common/make_icon_from_soft.py b/common/make_icon_from_soft.py
index b866463..141abe9 100644
--- a/common/make_icon_from_soft.py
+++ b/common/make_icon_from_soft.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3 -B
+#!/usr/bin/env python3 -B
 #--------------------------------------------------------
 # make_icon_from_soft.py --
 #
diff --git a/common/og_gui_characterize.py b/common/og_gui_characterize.py
index 1c56555..2eacab5 100755
--- a/common/og_gui_characterize.py
+++ b/common/og_gui_characterize.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3 -B
+#!/usr/bin/env python3 -B
 #
 #--------------------------------------------------------
 # Open Galaxy Project Manager GUI.
diff --git a/common/og_gui_manager.py b/common/og_gui_manager.py
index 921b3f1..f6f4cc3 100755
--- a/common/og_gui_manager.py
+++ b/common/og_gui_manager.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3 -B
+#!/usr/bin/env python3 -B
 #
 #--------------------------------------------------------
 # Open Galaxy Project Manager GUI.
@@ -3351,7 +3351,7 @@
             designname = self.project_name
             print('Run LVS on design ' + designname + ' (' + design + ')')
             # use Popen, not run, so that application does not wait for it to exit.
-            subprocess.Popen([og_config.apps_path + '/lvs_manager.py', design, designname])
+            subprocess.Popen(['netgen','-gui',design, designname])
         else:
             print("You must first select a project.", file=sys.stderr)
 
diff --git a/common/profile.py b/common/profile.py
index 83a8dc1..6a46d22 100755
--- a/common/profile.py
+++ b/common/profile.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #------------------------------------------------------------
 # Profile settings window for the Open Galaxy project manager
diff --git a/common/rename_project.py b/common/rename_project.py
index 8c06c8b..d21d462 100755
--- a/common/rename_project.py
+++ b/common/rename_project.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3 -B
+#!/usr/bin/env python3 -B
 #
 # rename_project.py ---  Perform all tasks required for renaming a project.
 #
diff --git a/common/settings.py b/common/settings.py
index f25c107..a1c48f2 100755
--- a/common/settings.py
+++ b/common/settings.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #-----------------------------------------------------------
 # Settings window for the Open Galaxy characterization tool
diff --git a/common/simhints.py b/common/simhints.py
index 3dbe48f..0d1d0cb 100755
--- a/common/simhints.py
+++ b/common/simhints.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #-----------------------------------------------------------
 # Simulation hints management for the Open Galaxy
diff --git a/common/symbolbuilder.py b/common/symbolbuilder.py
index 7a38781..23532d4 100755
--- a/common/symbolbuilder.py
+++ b/common/symbolbuilder.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 #--------------------------------------------------------
 # Symbol Builder for the Open Galaxy project manager
diff --git a/common/tksimpledialog.py b/common/tksimpledialog.py
index f11bbfa..4734291 100755
--- a/common/tksimpledialog.py
+++ b/common/tksimpledialog.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 # Dialog class for tkinter
 
diff --git a/common/tooltip.py b/common/tooltip.py
index 4423bb9..4f5e31f 100755
--- a/common/tooltip.py
+++ b/common/tooltip.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 '''Michael Lange <klappnase (at) freakmail (dot) de>
 The ToolTip class provides a flexible tooltip widget for tkinter; it is based on IDLE's ToolTip
 module which unfortunately seems to be broken (at least the version I saw).
diff --git a/common/treeviewchoice.py b/common/treeviewchoice.py
index dba0f26..7db3620 100755
--- a/common/treeviewchoice.py
+++ b/common/treeviewchoice.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 # Simple ttk treeview with scrollbar and select button
 
diff --git a/common/treeviewsplit.py b/common/treeviewsplit.py
index 0435d7b..f8b1a44 100755
--- a/common/treeviewsplit.py
+++ b/common/treeviewsplit.py
@@ -1,4 +1,4 @@
-#!/ef/efabless/opengalaxy/venv/bin/python3
+#!/usr/bin/env python3
 #
 # Simple ttk treeview with split view, scrollbar, and
 # row of callback buttons