diff --git a/INFO b/INFO
index 76bba69..617194a 100644
--- a/INFO
+++ b/INFO
@@ -1,5 +1,5 @@
 package="openHAB2"
-version="2.2.0.003-SNAPSHOT"
+version="2.2.0.004-SNAPSHOT"
 maintainer="openHAB.org"
 maintainer_url="http://openhab.org/"
 distributor="cniweb, tim, dieter, dominic, schoppax"
@@ -12,4 +12,4 @@ helpurl="https://community.openhab.org/"
 package_icon="PACKAGE_ICON.PNG"
 package_icon_120="PACKAGE_ICON_120.PNG"
 startable="yes"
-changelog="2.2.0.003-SNAPSHOT 18.07.2017: Fix public folder,2.2.0.002-SNAPSHOT 12.07.2017: Update from openHAB 2.1.0.007,02.07.2017: Update to openHAB 2.2.0-SNAPSHOT,2.1.0.004-SNAPSHOT 13.03.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.003-SNAPSHOT 06.02.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.002-SNAPSHOT 30.01.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.001-SNAPSHOT 24.01.2017: Update to openHAB 2.1.0-SNAPSHOT,2.0.0.008-SNAPSHOT 10.11.2016: Update to openHAB 2.0.0-SNAPSHOT,2.0.0.007-SNAPSHOT 23.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.006-SNAPSHOT 23.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.005-SNAPSHOT 20.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.004-SNAPSHOT 09.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.003-beta3 02.06.2016: Update to openHAB 2.0.0-beta3;2.0.0.002-beta2 14.02.2016: Update to openHAB 2.0.0-beta2;2.0.0.001-beta1 31.01.2016: Update to openHAB 2.0.0-beta1"
+changelog="2.2.0.004-SNAPSHOT 20.07.2017: Fix public folder permissions, replace 7z with tar and backup fix,2.2.0.003-SNAPSHOT 18.07.2017: Fix public folder,2.2.0.002-SNAPSHOT 12.07.2017: Update from openHAB 2.1.0.007,02.07.2017: Update to openHAB 2.2.0-SNAPSHOT,2.1.0.004-SNAPSHOT 13.03.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.003-SNAPSHOT 06.02.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.002-SNAPSHOT 30.01.2017: Update to openHAB 2.1.0-SNAPSHOT,2.1.0.001-SNAPSHOT 24.01.2017: Update to openHAB 2.1.0-SNAPSHOT,2.0.0.008-SNAPSHOT 10.11.2016: Update to openHAB 2.0.0-SNAPSHOT,2.0.0.007-SNAPSHOT 23.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.006-SNAPSHOT 23.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.005-SNAPSHOT 20.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.004-SNAPSHOT 09.10.2016: Update to openHAB 2.0.0-SNAPSHOT;2.0.0.003-beta3 02.06.2016: Update to openHAB 2.0.0-beta3;2.0.0.002-beta2 14.02.2016: Update to openHAB 2.0.0-beta2;2.0.0.001-beta1 31.01.2016: Update to openHAB 2.0.0-beta1"
diff --git a/PKG_DEPS b/PKG_DEPS
index 39e3e45..1f36e4e 100644
--- a/PKG_DEPS
+++ b/PKG_DEPS
@@ -1 +1 @@
-pkg_min_ver=6.0
+pkg_min_ver=4.0
diff --git a/scripts/installer.sh b/scripts/installer.sh
index d06f972..9ea06d8 100644
--- a/scripts/installer.sh
+++ b/scripts/installer.sh
@@ -4,7 +4,7 @@
 #--------package based on work from pcloadletter.co.uk
 
 DOWNLOAD_PATH="https://openhab.ci.cloudbees.com/job/openHAB-Distribution/lastSuccessfulBuild/artifact/distributions/openhab/target"
-DOWNLOAD_FILE1="openhab-2.2.0-SNAPSHOT.zip"
+DOWNLOAD_FILE1="openhab-2.2.0-SNAPSHOT.tar.gz"
 
 # Add more files by separating them using spaces
 INSTALL_FILES="${DOWNLOAD_PATH}/${DOWNLOAD_FILE1}"
@@ -14,6 +14,7 @@ EXTRACTED_FOLDER="openHAB-2.2.0-SNAPSHOT"
 DAEMON_USER="$(echo ${SYNOPKG_PKGNAME} | awk {'print tolower($_)'})"
 DAEMON_PASS="$(openssl rand 12 -base64 2>nul)"
 DAEMON_ID="${SYNOPKG_PKGNAME} daemon user"
+DAEMON_ACL="user:${DAEMON_USER}:allow:rwxpdDaARWc--:fd--"
 ENGINE_SCRIPT="start.sh"
 PIDFILE="/var/services/homes/${DAEMON_USER}/.daemon.pid"
 
@@ -23,9 +24,11 @@ TEMP_FOLDER="$(find / -maxdepth 2 -name '@tmp' | head -n 1)"
 PRIMARY_VOLUME="$(echo ${TEMP_FOLDER} | grep -oP '^/[^/]+')"
 PUBLIC_FOLDER="$(synoshare --get public | grep -oP 'Path.+\[\K[^]]+')"
 
+PUBLIC_OH_FOLDERS_EXISTS=no
 PUBLIC_CONF="${PUBLIC_FOLDER}/openHAB2/conf"
 PUBLIC_ADDONS="${PUBLIC_FOLDER}/openHAB2/addons"
-TIMESTAMP=`date +%Y%m%d_%H%M%S`;
+TIMESTAMP="$(date +%Y%m)"
+BACKUP_FOLDER="${SYNOPKG_PKGDEST}-backup-$TIMESTAMP"
 
 preinst ()
 {
@@ -99,7 +102,8 @@ postinst ()
   #extract main archive
   echo "Install new version"
   cd ${TEMP_FOLDER}
-  7z x ${TEMP_FOLDER}/${DOWNLOAD_FILE1} -o${EXTRACTED_FOLDER} && rm ${TEMP_FOLDER}/${DOWNLOAD_FILE1}
+  mkdir ${EXTRACTED_FOLDER}
+  tar -xf ${TEMP_FOLDER}/${DOWNLOAD_FILE1} -C ${EXTRACTED_FOLDER} && rm ${TEMP_FOLDER}/${DOWNLOAD_FILE1}
   mv ${TEMP_FOLDER}/${EXTRACTED_FOLDER}/* ${SYNOPKG_PKGDEST}
   rmdir ${TEMP_FOLDER}/${EXTRACTED_FOLDER}
   chmod +x ${SYNOPKG_PKGDEST}/${ENGINE_SCRIPT}
@@ -107,28 +111,38 @@ postinst ()
   echo "Create conf/addon links"
   #if configdir exists in public folder -> create a symbolic link
   if [ -d ${PUBLIC_CONF} ]; then
-    mv ${SYNOPKG_PKGDEST}/conf/* ${PUBLIC_CONF}
+    PUBLIC_OH_FOLDERS_EXISTS=yes
+    mv -u ${SYNOPKG_PKGDEST}/conf/* ${PUBLIC_CONF}
     rm -r ${SYNOPKG_PKGDEST}/conf
     ln -s ${PUBLIC_CONF} ${SYNOPKG_PKGDEST}
-    chmod -R u+w ${PUBLIC_CONF}
+    synoacltool -get ${PUBLIC_CONF} | grep -F ${DAEMON_ACL} > /dev/null || synoacltool -add ${PUBLIC_CONF} ${DAEMON_ACL}
   fi
 
   #if public addons dir exists in public folder -> create a symbolic link
   if [ -d ${PUBLIC_ADDONS} ]; then
-    mv ${SYNOPKG_PKGDEST}/addons/* ${PUBLIC_ADDONS}
+    PUBLIC_OH_FOLDERS_EXISTS=yes
+    mv -u ${SYNOPKG_PKGDEST}/addons/* ${PUBLIC_ADDONS}
     rm -r ${SYNOPKG_PKGDEST}/addons
     ln -s ${PUBLIC_ADDONS} ${SYNOPKG_PKGDEST}
-    chmod -R u+w ${PUBLIC_ADDONS}
+    synoacltool -get ${PUBLIC_ADDONS} | grep -F ${DAEMON_ACL} > /dev/null || synoacltool -add ${PUBLIC_ADDONS} ${DAEMON_ACL}
   fi
 
   #add log file
   mkdir -p ${SYNOPKG_PKGDEST}/userdata/logs
   touch ${SYNOPKG_PKGDEST}/userdata/logs/openhab.log
-
+  
+  # Restore UserData if exists
+  if [ -d ${BACKUP_FOLDER} ]; then
+    cp -arf ${BACKUP_FOLDER}/userdata ${SYNOPKG_PKGDEST}/
+  fi
+  
   #change owner of folder tree
   echo "Fix permissions"
-  chown -hR ${DAEMON_USER} ${PUBLIC_CONF}
-  chown -hR ${DAEMON_USER} ${PUBLIC_ADDONS}
+  if [ $PUBLIC_OH_FOLDERS_EXISTS == yes ]; then
+    synoshare --setuser public RO + ${DAEMON_USER}
+    chown -hR ${DAEMON_USER} ${PUBLIC_CONF}
+    chown -hR ${DAEMON_USER} ${PUBLIC_ADDONS}
+  fi
   chown -hR ${DAEMON_USER} ${SYNOPKG_PKGDEST}
   chmod -R u+w ${SYNOPKG_PKGDEST}/userdata
 
@@ -139,6 +153,8 @@ postinst ()
   if [ -d /dev/ttyACM1 ]; then
     chmod 777 /dev/ttyACM1
   fi
+  
+  echo "Installation done." > $SYNOPKG_TEMP_LOGFILE;
 
   exit 0
 }
@@ -171,7 +187,7 @@ postuninst ()
   else
     echo "Daemon user folder '${DAEMON_HOME}' not found - nothing deleted"
   fi
-
+  
   exit 0
 }
 
@@ -184,56 +200,45 @@ preupgrade ()
     rm -f $PIDFILE
   fi
   sleep 10
-
-  # Remove tmp, logs & cache dirs
+  
+  # Remove tmp, logs, cache and runtime dirs
   if [ -d ${SYNOPKG_PKGDEST}/userdata/tmp ]; then
-  	echo "Remove tmp"
   	rm -rf ${SYNOPKG_PKGDEST}/userdata/tmp
   fi
 
   if [ -d ${SYNOPKG_PKGDEST}/userdata/cache ]; then
-  	echo "Remove cache"
   	rm -rf ${SYNOPKG_PKGDEST}/userdata/cache
   fi
 
   if [ -d ${SYNOPKG_PKGDEST}/userdata/log ]; then
-  	echo "Remove log"
   	rm -rf ${SYNOPKG_PKGDEST}/userdata/log
   fi
 
   if [ -d ${SYNOPKG_PKGDEST}/userdata/logs ]; then
-  	echo "Remove logs"
   	rm -rf ${SYNOPKG_PKGDEST}/userdata/logs
   fi
-
-  # backup current installation with settings
-  echo "Backup"
-  mv ${SYNOPKG_PKGDEST} /${SYNOPKG_PKGDEST}-backup-$TIMESTAMP
-
-  echo "Get new version"
-  cd ${TEMP_FOLDER}
-  # go through list of files
-  for WGET_URL in ${INSTALL_FILES}; do
-    WGET_FILENAME="$(echo ${WGET_URL} | sed -r "s%^.*/(.*)%\1%")"
-    echo "Processing ${WGET_FILENAME}"
-    [ -f "${TEMP_FOLDER}/${WGET_FILENAME}" ] && rm ${TEMP_FOLDER}/${WGET_FILENAME}
-    # use local file first
-    if [ -f "${PUBLIC_FOLDER}/${WGET_FILENAME}" ]; then
-      echo "Found file locally - copying"
-      cp ${PUBLIC_FOLDER}/${WGET_FILENAME} ${TEMP_FOLDER}
-    else
-      wget -nv --no-check-certificate --output-document=${WGET_FILENAME} ${WGET_URL}
-      if [[ $? != 0 ]]; then
-          echo "There was a problem downloading ${WGET_FILENAME} from the download link:"
-          echo "'${WGET_URL}'"
-          echo "Alternatively, download this file manually and place it in the 'public' shared folder and start installation again."
-          if [ -z "${PUBLIC_FOLDER}" ];then
-            echo "Note: You must create a 'public' shared folder first on your primary volume"
-          fi
-          exit 1
-      fi
-    fi
-  done
+  
+  if [ -d ${SYNOPKG_PKGDEST}/runtime ]; then
+    rm -rf ${SYNOPKG_PKGDEST}/runtime
+  fi
+  
+  # Remove openHAB system files...
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/all.policy
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/branding.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/branding-ssh.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/config.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/custom.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/version.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/distribution.info
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/jre.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/profile.cfg
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/startup.properties
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/org.apache.karaf*
+  rm -f ${SYNOPKG_PKGDEST}/userdata/etc/org.ops4j.pax.url.mvn.cfg
+  
+  # Create backup
+  mkdir -p ${BACKUP_FOLDER}/userdata
+  mv ${SYNOPKG_PKGDEST}/userdata/* ${BACKUP_FOLDER}/userdata
 
   exit 0
 }
@@ -241,45 +246,10 @@ preupgrade ()
 
 postupgrade ()
 {
-  #extract main archive
-  echo "Install new version"
-  cd ${TEMP_FOLDER}
-  7z x ${TEMP_FOLDER}/${DOWNLOAD_FILE1} -o${EXTRACTED_FOLDER} && rm ${TEMP_FOLDER}/${DOWNLOAD_FILE1}
-  mv ${TEMP_FOLDER}/${EXTRACTED_FOLDER}/* ${SYNOPKG_PKGDEST}
-  rmdir ${TEMP_FOLDER}/${EXTRACTED_FOLDER}
-  chmod +x ${SYNOPKG_PKGDEST}/${ENGINE_SCRIPT}
-
-  # restore configuration and userdata
-  echo "Restore UserData"
-  cp -ar ${SYNOPKG_PKGDEST}-backup-$TIMESTAMP/userdata ${SYNOPKG_PKGDEST}/
-
-  echo "Create conf/addon links"
-  #if configdir exists in public folder -> create a symbolic link
-  if [ -d ${PUBLIC_CONF} ]; then
-    mv ${SYNOPKG_PKGDEST}/conf/* ${PUBLIC_CONF}
-    rm -r ${SYNOPKG_PKGDEST}/conf
-    ln -s ${PUBLIC_CONF} ${SYNOPKG_PKGDEST}
-    chmod -R u+w ${PUBLIC_CONF}
-  fi
-
-  #if public addons dir exists in public folder -> create a symbolic link
-  if [ -d ${PUBLIC_ADDONS} ]; then
-    mv ${SYNOPKG_PKGDEST}/addons/* ${PUBLIC_ADDONS}
-    rm -r ${SYNOPKG_PKGDEST}/addons
-    ln -s ${PUBLIC_ADDONS} ${SYNOPKG_PKGDEST}
-    chmod -R u+w ${PUBLIC_ADDONS}
-  fi
-
-  #add log file
-  mkdir -p ${SYNOPKG_PKGDEST}/userdata/logs
-  touch ${SYNOPKG_PKGDEST}/userdata/logs/openhab.log
-
-  # fix permissions
-  echo "Fix permissions"
-  chown -hR ${DAEMON_USER} ${PUBLIC_CONF}
-  chown -hR ${DAEMON_USER} ${PUBLIC_ADDONS}
-  chown -hR ${DAEMON_USER} ${SYNOPKG_PKGDEST}
-  chmod -R u+w ${SYNOPKG_PKGDEST}/userdata
-
+  # Remove all backups after installation
+  rm -rf ${SYNOPKG_PKGDEST}-backup*
+  
+  echo "Update done." > $SYNOPKG_TEMP_LOGFILE
+  
   exit 0
 }
diff --git a/scripts/start-stop-status.sh b/scripts/start-stop-status.sh
index 0b1d4e5..f00d093 100644
--- a/scripts/start-stop-status.sh
+++ b/scripts/start-stop-status.sh
@@ -26,13 +26,13 @@ case $1 in
     
     #set the current timezone for Java so that log timestamps are accurate
     #we need to use the modern timezone names so that Java can figure out DST
-    SYNO_TZ=`cat /etc/synoinfo.conf | grep timezone | cut -f2 -d'"'`
-    #fix for DST time in DSM 5.2 thanks to MinimServer Syno package author
-    [ -e /usr/share/zoneinfo/Timezone/synotztable.json ] \
-    && SYNO_TZ=`jq ".${SYNO_TZ} | .nameInTZDB" /usr/share/zoneinfo/Timezone/synotztable.json | sed -e "s/\"//g"` \
-    || SYNO_TZ=`grep "^${SYNO_TZ}" /usr/share/zoneinfo/Timezone/tzname | sed -e "s/^.*= //"`
-    #Before DSM 5.1
-    #SYNO_TZ=grep "^${SYNO_TZ}" /usr/share/zoneinfo/Timezone/tzlist | sed -e "s/^.*= //"
+    if [ -n "$SYNOPKG_DSM_VERSION_MAJOR" -a $SYNOPKG_DSM_VERSION_MAJOR -ge 6 ]; then
+      SYNO_TZ=$(cat /etc/synoinfo.conf | grep timezone | cut -f2 -d'"')
+    else
+      [ -e /usr/share/zoneinfo/Timezone/synotztable.json ] \
+      && SYNO_TZ=$(jq ".${SYNO_TZ} | .nameInTZDB" /usr/share/zoneinfo/Timezone/synotztable.json | sed -e "s/\"//g") \
+      || SYNO_TZ=$(grep "^${SYNO_TZ}" /usr/share/zoneinfo/Timezone/tzname | sed -e "s/^.*= //")
+    fi  
     grep "^export TZ" ${DAEMON_HOME}/.profile > /dev/null \
      && sed -i "s%^export TZ=.*$%export TZ='${SYNO_TZ}'%" ${DAEMON_HOME}/.profile \
      || echo export TZ=\'${SYNO_TZ}\' >> ${DAEMON_HOME}/.profile