diff --git a/README.md b/README.md
index 6e4ef31..df1c929 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,9 @@ Congratulations your Piler is installed...
 
 The Piler can now be reached at http://your-domain:8080.
 
+- After installation, any changes can be made in Piler.conf at any time and the install script can then be run again.
+
+
 ******************************************************************************************************
 
 ### SSL certificates
diff --git a/install-piler.sh b/install-piler.sh
index ab86ed2..51ccfa3 100644
--- a/install-piler.sh
+++ b/install-piler.sh
@@ -19,7 +19,12 @@ echo "backup the File config-site.php"
 echo "==================================="
 echo
 
-cp /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php.bak
+if [ ! -f /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php.bak ]; then
+    cp /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php.bak
+else
+    rm /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php
+    cp /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php.bak /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php
+fi
 
 echo
 echo "==================================="
@@ -104,7 +109,7 @@ EOF
 curl -o /var/lib/docker/volumes/piler-docker_piler_etc/_data/auth-mailcow.php https://raw.githubusercontent.com/patschi/mailpiler-mailcow-integration/master/auth-mailcow.php
 fi
 
-# docker start
+# docker restart
 echo
 echo "==================================="
 echo "restart docker-compose ..."
diff --git a/piler.conf b/piler.conf
index 6957309..2c4f10e 100644
--- a/piler.conf
+++ b/piler.conf
@@ -1,25 +1,53 @@
-################################ User Settings ##################################
+############## User Settings ##############
 
-PILER_DOMAIN="piler.example.com"        # your Piler Domain
-SUPPORT_MAIL="admin@example.com"        # your Mailserver Admin Mail
-IMAP_SERVER="imap.example.com"          # your IMAP Server
-TIME_ZONE="Europe/Berlin"               # your Timezone
-SMARTHOST="127.0.0.1"                   # Default 127.0.0.1
+# your Piler Domain
 
-##################################################################################
+PILER_DOMAIN="piler.example.com"
 
-################################ MySql Settings ##################################
+# your Mailserver Admin Mail
 
-MYSQL_DATABASE="piler"                  # MySql Database
-MYSQL_USER="piler"                      # MySql User
-MYSQL_PASSWORD="<your-mysql-password>"  # MySql Password
+SUPPORT_MAIL="admin@example.com"
 
-##################################################################################
+# your IMAP Server
 
-########################### optional Mailcow Settings ############################
+IMAP_SERVER="imap.example.com"
 
-USE_MAILCOW=false                       # if Use Mailcow API Options set "true"
-MAILCOW_APIKEY="your_Mailcow_API-Key"   # your Mailcow API-Key
-MAILCOW_HOST="mail.example.com"         # your Mailcow Host Domain
+# your Timezone
 
-###################################################################################
+TIME_ZONE="Europe/Berlin"
+
+# Smarthost Default 127.0.0.1
+
+SMARTHOST="127.0.0.1"
+
+############################################
+
+########### MySql Settings #################
+
+# MySql Database
+
+MYSQL_DATABASE="piler"
+
+# MySql User
+
+MYSQL_USER="piler"
+
+# MySql Password
+
+MYSQL_PASSWORD="<your-mysql-password>"
+
+#############################################
+
+######### optional Mailcow Settings #########
+
+# if Use Mailcow API Options set "true"
+
+USE_MAILCOW=false
+
+# your Mailcow API-Key
+
+MAILCOW_APIKEY="your_Mailcow_API-Key"
+
+# your Mailcow Host Domain
+
+MAILCOW_HOST="mail.example.com"