diff --git a/auto_archive.py b/auto_archive.py
index d3891e9..8d1443d 100644
--- a/auto_archive.py
+++ b/auto_archive.py
@@ -86,10 +86,10 @@ def revert(run_log, target_dir, archive_folder=ARCHIVE_FOLDER):
         'ignore': ['archive_config.json', '.archive_config.json', '.DS_Store', 'Icon\r'],
         'check_access_time': False,
         'by_osx_date_added': False,
+        'disable_check_osx_date_added': False,
         'log_level': 'ERROR',
         'debug': False,
         'debug_archive_threshold': 1,
-        'debug_disable_check_osx_date_added': False
     }
     config_file = os.path.join(target_dir, 'archive_config.json')
     config_file_hidden = os.path.join(target_dir, '.archive_config.json')
@@ -118,6 +118,7 @@ def revert(run_log, target_dir, archive_folder=ARCHIVE_FOLDER):
     ignore_list = config['ignore']
     check_access_time = config['check_access_time']
     by_osx_date_added = by_osx_date_added and config['by_osx_date_added'] # so it always be false on other platforms
+    osx_date_added = not config['disable_check_osx_date_added']
     LOG_LEVEL = config['log_level']
 
     # if in debug mode, set archive folder to Archive_Debug
@@ -125,7 +126,6 @@ def revert(run_log, target_dir, archive_folder=ARCHIVE_FOLDER):
     if debug_mode:
         archive_folder = 'Archive_Debug'
         archive_threshold = config['debug_archive_threshold']
-        osx_date_added = not config['debug_disable_check_osx_date_added']
         # also, save target_dir and self_name to file
         # and config
         err_log('target_dir: {}'.format(target_dir), log_type='Debug')
diff --git a/setup.py b/setup.py
index 02bf5bf..9416915 100644
--- a/setup.py
+++ b/setup.py
@@ -5,15 +5,19 @@
     python setup.py py2app
 """
 
+from datetime import datetime
+
 from setuptools import setup
 
 APP = ['auto_archive.py']
 DATA_FILES = []
+VERSION = '0.0.2'
+
 PLIST = {
-    'CFBundleShortVersionString': '0.0.1',
-    'CFBundleGetInfoString': 'AutoArchive 0.0.1',
+    'CFBundleShortVersionString': VERSION,
+    'CFBundleGetInfoString': f'AutoArchive {VERSION}',
     'CFBundleIdentifier': 'net.extrawdw.AutoArchive',
-    'NSHumanReadableCopyright': 'Copyright © 2023 Dingwen Wang. All rights reserved.',
+    'NSHumanReadableCopyright': f'Copyright © {datetime.now().year} Dingwen Wang. All rights reserved.',
 }
 OPTIONS = {
     'iconfile': '/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/AllMyFiles.icns',
diff --git a/update.sh b/update.sh
new file mode 100755
index 0000000..d246af8
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# functions
+find_app() {
+    # https://stackoverflow.com/a/51806092
+    local name_app="$1"
+    local path_launchservices="/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister"
+    $path_launchservices -dump | grep -o "/.*${name_app}.app" | grep -v -E "Caches|TimeMachine|Temporary|/Volumes/${name_app}" | uniq
+}
+
+trash() { osascript -e "tell application \"Finder\" to delete POSIX file \"$(grealpath "$1")\"" > /dev/null; }
+
+# constants
+APP_NAME="AutoArchive"
+APP_DIRNAME="$APP_NAME.app"
+
+# Hello
+echo "$APP_NAME Updater"
+
+# Try read source from argument, if not provided, use "./dist/AutoArchive.app"
+source=${1:-"./dist/$APP_DIRNAME"}
+
+# Get the absolute path of ./dist/AutoArchive.app
+source=$(cd "$(dirname "$source")"; pwd -P)/$(basename "$source")
+source_bundle_id=$(defaults read "$source/Contents/Info.plist" CFBundleIdentifier)
+source_version=$(defaults read "$source/Contents/Info.plist" CFBundleShortVersionString)
+
+# Print source bundle identifier and version
+echo "Source: $source"
+echo "Source Bundle ID: $source_bundle_id"
+echo "Source App Version: $source_version"
+
+echo "Press Enter to continue..."
+read
+
+# Find all installations of AutoArchive.app
+echo "Finding all $APP_NAME installations..."
+apps_path=$(find_app "$APP_NAME")
+
+# Set IFS to newline only
+IFS=$'\n'
+
+# Loop through all installations of AutoArchive.app
+for target in $apps_path; do
+    # Ignore certain paths
+    if [[ "$target" == *"/Volumes/"* ]]; then
+        echo "Ignoring $target because it is on /Volumes/"
+        continue
+    fi
+    if [[ "$target" == *"/.Trash/"* ]]; then
+        echo "Ignoring $target because it is in /.Trash/"
+        continue
+    fi
+    if [[ "$target" == "$source" ]]; then
+        echo "Ignoring $target because it is the source"
+        continue
+    fi
+
+    # get bundle id and version
+    unset bundle_id version
+    bundle_id=$(defaults read "$target/Contents/Info.plist" CFBundleIdentifier)
+    version=$(defaults read "$target/Contents/Info.plist" CFBundleShortVersionString)
+
+    if [[ "$bundle_id" != "$source_bundle_id" ]]; then
+        echo "Ignoring $target due to Bundle ID mismatch" 
+        continue
+    fi
+    if [[ "$version" == "$source_version" ]]; then
+        echo "Ignoring $target because it is the same version"
+        continue
+    fi
+
+    # Print target bundle identifier and version
+    echo "Found target: $target"
+    echo "Bundle ID: $bundle_id"
+    echo "App Version: $version"
+
+    # Print target path and ask for user confirmation
+    read -p "Do you want to replace this app with the new version? [y/n]: " response
+    if [[ "$response" != "y" ]]; then
+        echo "Skipping replacement for $target"
+        continue
+    fi
+
+    # Use trash to delete old app safely
+    echo "Moving target to trash..."
+    trash "$target"
+
+    # Replace target with source
+    echo "Copying new version to $target"
+    cp -a "$source" "$target"
+done