diff --git a/.gitignore b/.gitignore
index 6d0d3ad..2af73c8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 __pycache__
+appimage-build
 AppDir
 *.AppImage
 NMReval*.zsync
diff --git a/AppDir/usr/src/nmreval/io/merge_agr.py b/AppDir/usr/src/nmreval/io/merge_agr.py
deleted file mode 100755
index 8a52a07..0000000
--- a/AppDir/usr/src/nmreval/io/merge_agr.py
+++ /dev/null
@@ -1,48 +0,0 @@
-#!/usr/bin/env python3
-
-import re
-import argparse
-
-
-def merger(infiles, outfile):
-    header = ''
-    graphs = ''
-    counter = 0
-    for f in infiles:
-        headerflag = True
-        for line in f.readlines():
-            if re.match('@with [Gg][0-9]', line):
-                headerflag = False
-                # one graph per file, adjust graph number
-                line = '@with g{}\n'.format(counter)
-            if headerflag:
-                if graphs == '':
-                    # save fonts, colors etc. of first file
-                    header += line
-                elif re.match('@[Gg][0-9]', line):
-                    # save graph specifications of following files
-                    line = re.sub('@[Gg][0-9]', '@g{}'.format(counter), line)
-                    header += line
-                else:
-                    pass
-            else:
-                # save sets 
-                if re.match('@target [Gg][0-9]', line):
-                    line = re.sub('@target [Gg][0-9]',
-                                  '@target G{}'.format(counter), line)
-                graphs += line
-        counter += 1
-    outfile.write(header+graphs)
-
-
-parser = argparse.ArgumentParser()
-
-parser.add_argument('input', nargs='+', type=argparse.FileType('r'),
-                    help='One or more input files')
-parser.add_argument('--output', '-o', nargs='?', type=argparse.FileType('w'),
-                    default='merger_grace.agr',
-                    help='Output file (default=merged_grace.agr)')
-
-args = parser.parse_args()
-
-merger(args.input, args.output)
diff --git a/AppImageBuilder.yml b/AppImageBuilder.yml
index b236cfb..45405d5 100644
--- a/AppImageBuilder.yml
+++ b/AppImageBuilder.yml
@@ -5,19 +5,22 @@ script:
   # Make usr and icons dirs
   - mkdir -p $TARGET_APPDIR/usr/src
   - mkdir -p $TARGET_APPDIR/usr/bin
+  - mkdir -p $TARGET_APPDIR/usr/share/icons
+  - mkdir -p $TARGET_APPDIR/usr/share/applications
+  # copy logo
+  - cp src/resources/logo.png $TARGET_APPDIR/usr/share/icons/
   # Copy the python application code into the AppDir
-  - cp -r bin/evaluate.py  $TARGET_APPDIR/usr/bin/
+  - cp bin/evaluate.py  $TARGET_APPDIR/usr/bin/
   - cp -r src/*  $TARGET_APPDIR/usr/src/
-  # Install application dependencies
-  #- python3 -m pip install --ignore-installed --prefix=/usr --root=$TARGET_APPDIR -r ./requirements.txt
+  - cp src/pkm.vogel.nmreval.desktop $TARGET_APPDIR/usr/share/applications
 
 
 AppDir:
   app_info:
     id: pkm.vogel.nmreval
     name: NMReval
-    icon: utilities-terminal
-    version: 0.1.0
+    icon: logo
+    version: 0.2.0
     # Set the python executable as entry point
     exec: usr/bin/python3
     # Set the application main script path as argument. Use '$@' to forward CLI parameters
@@ -30,9 +33,12 @@ AppDir:
       - sourceline: 'deb [arch=amd64] http://deb.debian.org/debian/ bullseye main contrin non-free'
 
     include:
+      # for /usr/bin/env
+      - coreutils
       - dash
-      - python3
-      - python3-pkg-resources
+      - gnome-accessibility-themes
+      - libatlas3-base
+      - python3.9-minimal
       - python3-pyqt5
       - python3-numpy
       - python3-matplotlib
@@ -74,6 +80,6 @@ AppDir:
       command: ./AppRun
 
 AppImage:
-  update-information: 'NMReval-*.AppImage.zsync'
+  update-information: 'zsync|http://mirror.infra.pkm/nmreval/NMReval-latest.AppImage.zsync'
   sign-key: None
   arch: x86_64
diff --git a/create_AppImage.bash b/create_AppImage.bash
index 8118ccc..91e16a5 100644
--- a/create_AppImage.bash
+++ b/create_AppImage.bash
@@ -1,3 +1,8 @@
-wget https://github.com/AppImageCrafters/appimage-builder/releases/download/v1.1.0/appimage-builder-1.1.0-x86_64.AppImage
+BUILDER=appimage-builder-1.1.0-x86_64.AppImage
+if [ -f $BUILDER ]; then
+	echo $BUILDER
+else
+	wget https://github.com/AppImageCrafters/appimage-builder/releases/download/v1.1.0/$BUILDER
+fi
 chmod +x appimage-builder-1.1.0-x86_64.AppImage
-./appimage-builder-1.1.0-x86_64.AppImage
+./appimage-builder-1.1.0-x86_64.AppImage --skip-tests