diff --git a/ParforProgress2.m b/ParforProgress2.m
index 47a685d..12129a8 100644
--- a/ParforProgress2.m
+++ b/ParforProgress2.m
@@ -12,18 +12,22 @@
 % end of each iteration. This sends a notification back to the server which 
 % then updates the GUI.
 %
-% Example:
 %
-% N = 100;
-% ppm = ParforProgress2('my task', N);
-% parfor i = 1 : N
-%     rand(1);
-%     ppm.increment(i);
-% end
-% delete(ppm);
+% Example:
+%{
+
+    N = 10000;
+    ppm = ParforProgress2('my task', N);
+    parfor i = 1 : N
+        rand(1);
+        ppm.increment(i);
+    end
+    delete(ppm);
+
+%}
 %
 %
-% Copyright (c) 2010-2014, Andreas Kotowicz
+% Copyright (c) 2010-2023, Andreas Kotowicz
 
 classdef ParforProgress2 < handle
 
@@ -86,6 +90,9 @@
                 o.JavaBit   = ParforProgressServer2.createServer(s, n, percentage, use_gui, show_execution_time);
                 o.Port      = double(o.JavaBit.getPort());
                 
+                % get the version number
+                % o.JavaBit.getVersion()
+                
                 % Get the client host name from pctconfig - needs
                 % distcomp toolbox.
                 % cfg         = pctconfig;
diff --git a/ParforProgressClient2.class b/ParforProgressClient2.class
index 8de1757..a5443f4 100644
Binary files a/ParforProgressClient2.class and b/ParforProgressClient2.class differ
diff --git a/ParforProgressClient2.java b/ParforProgressClient2.java
index 536e7a5..a2ef463 100644
--- a/ParforProgressClient2.java
+++ b/ParforProgressClient2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2014, Andreas Kotowicz
+ * Copyright (c) 2010-2023, Andreas Kotowicz
  *
  *
  * ideas for this code are from:
diff --git a/ParforProgressConsole2.m b/ParforProgressConsole2.m
index d2f792a..50a30a4 100644
--- a/ParforProgressConsole2.m
+++ b/ParforProgressConsole2.m
@@ -3,7 +3,7 @@
 % use ParforProgressStarter() instead.    
 % not using saveobj and loadobj, because old matlab versions have problems
 % with it.
-% Copyright (c) 2010-2014, Andreas Kotowicz
+% Copyright (c) 2010-2023, Andreas Kotowicz
 
     properties (GetAccess = private, SetAccess = private)
         message
diff --git a/ParforProgressServer2$1.class b/ParforProgressServer2$1.class
index 331bfe0..cf6551f 100644
Binary files a/ParforProgressServer2$1.class and b/ParforProgressServer2$1.class differ
diff --git a/ParforProgressServer2.class b/ParforProgressServer2.class
index 19fb3fa..8b7f2fb 100644
Binary files a/ParforProgressServer2.class and b/ParforProgressServer2.class differ
diff --git a/ParforProgressServer2.java b/ParforProgressServer2.java
index 6524a7d..c57cceb 100644
--- a/ParforProgressServer2.java
+++ b/ParforProgressServer2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2014, Andreas Kotowicz
+ * Copyright (c) 2010-2023, Andreas Kotowicz
  *
  *
  * ideas for this code are from:
@@ -41,13 +41,13 @@
 
 import java.awt.GridLayout;
 import java.awt.event.*;
-
 import java.io.Console;
-
 import java.util.concurrent.atomic.AtomicBoolean;
 
 public class ParforProgressServer2 implements Runnable, ActionListener {
 
+	private static final String VERSION = "1.23.1";
+
 	private JFrame fFrame;
 	private JLabel fLabel;
 	private JProgressBar fBar;
@@ -141,6 +141,11 @@ public synchronized void updateGUI(){
 
     }
 
+    // Getter method for version
+    public static String getVersion() {
+        return VERSION;
+    }    
+
     private double goal;
     private double PERCENTAGE = 0.05;
     private double fraction_all;
@@ -150,7 +155,7 @@ public synchronized void updateGUI(){
     private double ETA_time = 0;
     
     // when did the monitor start / stop?
-    private static double time_start;
+    private double time_start;
     private static double time_stop; 
     
 	private ServerSocketChannel serverSocket;
@@ -172,7 +177,7 @@ public static double Round(double val, int places) {
         return (double) tmp / factor;
     }    
     
-    public static String CurrentRuntime(int precision) {
+    public String CurrentRuntime(int precision) {
         String runtime;
         time_stop = System.currentTimeMillis();
         
@@ -258,6 +263,7 @@ public void windowClosing(WindowEvent e) {
                 }
             });
             
+            // change width & height of progress bar here, then recompile
             fFrame.setSize(300, 75);
             fFrame.setVisible(true);
             fFrame.setResizable(true);
diff --git a/ParforProgressStarter2.m b/ParforProgressStarter2.m
index 6c50425..143dc11 100644
--- a/ParforProgressStarter2.m
+++ b/ParforProgressStarter2.m
@@ -58,7 +58,7 @@
 %
 %%%%%%%%%%%%%% End ParforProgressStarter2 suggested usage %%%%%%%%%%%%%%%%%
 % 
-% Copyright (c) 2010-2014, Andreas Kotowicz
+% Copyright (c) 2010-2023, Andreas Kotowicz
 %
     %%
 
@@ -126,16 +126,21 @@
     a = which(mfilename);
     dir_to_add = fileparts(a);
     
+    pathDelimiter = pathsep; % Gets the path delimiter based on OS
     if pool_slaves > 0
-        if java_enabled == 1 && run_javaaddpath == 1
+        if java_enabled == 1 && run_javaaddpath == 1 && ~isInJavaPath(dir_to_add)
             pctRunOnAll(['javaaddpath({''' dir_to_add '''})']);
         end
-        pctRunOnAll(['addpath(''' dir_to_add ''')']);
+        if ~isInMatlabPath(dir_to_add, pathDelimiter)
+            pctRunOnAll(['addpath(''' dir_to_add ''')']);
+        end
     else
-        if java_enabled == 1 && run_javaaddpath == 1
+        if java_enabled == 1 && run_javaaddpath == 1 && ~isInJavaPath(dir_to_add)
             javaaddpath({dir_to_add});
         end
-        addpath(dir_to_add);
+        if ~isInMatlabPath(dir_to_add, pathDelimiter)
+            addpath(dir_to_add);
+        end
     end
     
     %%
@@ -156,4 +161,20 @@
     end
     
 end
+
+
+%% Helper functions
+function isPresent = isInJavaPath(dir_to_check)
+    currentStaticJavaPath = javaclasspath('-static');
+    currentDynamicJavaPath = javaclasspath('-dynamic');
+    combinedJavaPath = [currentStaticJavaPath; currentDynamicJavaPath];
+    isPresent = any(strcmp(dir_to_check, combinedJavaPath));
+end
+
+function isPresent = isInMatlabPath(dir_to_check, pathDelimiter)
+    currentPath = strsplit(path, pathDelimiter);
+    isPresent = any(strcmp(dir_to_check, currentPath));
+end
+
 %% EOF
+
diff --git a/ParforProgressStressTest2.m b/ParforProgressStressTest2.m
index 3c95e9d..ea63966 100644
--- a/ParforProgressStressTest2.m
+++ b/ParforProgressStressTest2.m
@@ -3,7 +3,7 @@ function ParforProgressStressTest2(N, run_javaaddpath, show_execution_time)
 % use this function to determine how many simultaneous connections your
 % computer can handle, and adjust the ppm.increment() call accordingly.
 %
-% Copyright (c) 2010-2014, Andreas Kotowicz
+% Copyright (c) 2010-2023, Andreas Kotowicz
 %
 %%
 
@@ -20,7 +20,7 @@ function ParforProgressStressTest2(N, run_javaaddpath, show_execution_time)
 
     if nargin < 1
         % how many iterations of the for loop do we run?
-        N = 10000;
+        N = 5000;
     end
     
     %% initialize ParforProgress monitor
diff --git a/README.md b/README.md
index fc1b25f..28a1323 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 ## A) About
 
-This is version 0.2.8 of `ParforProgress2`, a simple parfor progress monitor for matlab. See also http://www.mathworks.com/matlabcentral/fileexchange/35609-matlab-parforprogress2.
+This is version 1.23.1 of `ParforProgress2`, a simple parfor progress monitor for matlab. See also matlab-ParforProgress2 on File Exchange [![View matlab-ParforProgress2 on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://de.mathworks.com/matlabcentral/fileexchange/35609-matlab-parforprogress2)
+
 
 This progress monitor comes with a nice wrapper [`ParforProgressStarter2.m`](ParforProgressStarter2.m) which will take care of adding the classes to the java class path, depending on whether matlabpool / parpool is enabled or not.
 
@@ -40,29 +41,36 @@ $ cd .matlab/R2013a
 $ echo "/path/to/matlab-ParforProgress2" > javaclasspath.txt
 ```
 
-Next, startup Matlab and call `ParforProgressStarter2`, but do not run `javaddpath`:
+On macOS this translates to:
+```
+$ cd ~/Library/Application\ Support/MathWorks/MATLAB/R2020a/  
+$ echo "/Users/username/Documents/GitHub/matlab-ParforProgress2" > javaclasspath.txt
+```
+
+
+Next, startup Matlab (or restart Matlab if it was running) and call `ParforProgressStarter2`, but do not run `javaddpath`:
 
 
 ```
- >> % setup parameters
- >> show_execution_time = 1;
- >> run_javaaddpath = 0;
- >> s = 'dummy task';
- >> n = 100;
- >> percentage = 0.1;
- >> do_debug = 0;
- >>
- >> % initialize the ProgressMonitor
- >> ppm = ParforProgressStarter2(s, n, percentage, do_debug, run_javaaddpath, show_execution_time)
- >> 
- >> % run your computation
- >> for j = 1 : n
- >>     your_computation();
- >>     ppm.increment(i); 
- >> end
- >>
- >> % delete the ProgressMonitor
- >> delete(ppm);
+ % setup parameters
+ show_execution_time = 1;
+ run_javaaddpath = 0;
+ s = 'dummy task';
+ n = 100;
+ percentage = 0.1;
+ do_debug = 0;
+ 
+ % initialize the ProgressMonitor
+ ppm = ParforProgressStarter2(s, n, percentage, do_debug, run_javaaddpath, show_execution_time)
+ 
+ % run your computation
+ for j = 1 : n
+     your_computation();
+     ppm.increment(j); 
+ end
+ 
+ % delete the ProgressMonitor
+ delete(ppm);
 ```
 
 
@@ -81,4 +89,13 @@ edit this file. Here's how you can locate it:
 
 
 
+## D) Recompile 
+
+On macOS
+
+```
+javac -source 1.8 -target 1.8 -cp .: ParforProgressServer2.java
+javac -source 1.8 -target 1.8 -cp .: ParforProgressClient2.java
+```
+