diff --git a/debian/changelog b/debian/changelog
index 28cbb4e..699d0f8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+votca-xtp (1.6.4-1) unstable; urgency=medium
+
+  * New upstream release.
+
+ -- Nicholas Breen <nbreen@debian.org>  Thu, 28 Jan 2021 21:45:40 -0800
+
 votca-xtp (1.6.3-1) unstable; urgency=medium
 
   * New upstream release.
diff --git a/debian/control b/debian/control
index 6e626e0..9b40696 100644
--- a/debian/control
+++ b/debian/control
@@ -18,9 +18,9 @@
                libfftw3-dev,
                libhdf5-dev,
                libsqlite3-dev,
-               libvotca-csg-dev (>= 1.6.3),
+               libvotca-csg-dev (>= 1.6.4),
                libvotca-csg-dev (<< 1.7~),
-               libvotca-tools-dev (>= 1.6.3),
+               libvotca-tools-dev (>= 1.6.4),
                libvotca-tools-dev (<< 1.7~),
                libxc-dev,
                pkg-config,
diff --git a/tutorials/GROMACS/Methane/QC_FILES/g09/anion_geo/polar/molpol.xml~ b/tutorials/GROMACS/Methane/QC_FILES/g09/anion_geo/polar/molpol.xml~
deleted file mode 100644
index d29b493..0000000
--- a/tutorials/GROMACS/Methane/QC_FILES/g09/anion_geo/polar/molpol.xml~
+++ /dev/null
@@ -1,20 +0,0 @@
-<options>
-	<molpol help="Molecular polarizability calculator (and optimizer)" label="tool:molpol">
-		<mpsfiles>
-			<input help="mps input file">CH4_i.mps</input>
-			<output help="mps output file">CH4_i.mps</output>
-			<polar help="xml file with infos on polarizability tensor">output.xml</polar>
-		</mpsfiles>
-		<induction>
-			<expdamp help="Thole sharpness parameter">0.39000</expdamp>
-			<wSOR help="mixing factor for convergence">0.35000</wSOR>
-			<maxiter help="maximum number of iterations">1024</maxiter>
-			<tolerance help="rel. tolerance for induced moments">0.00001</tolerance>
-		</induction>
-		<target>
-			<optimize help="if 'true', refine atomic polarizabilities to match molecular polarizable volume specified in target.molpol">true</optimize>
-			<molpol help="target polarizability tensor in format xx xy xz yy yz zz (this should be in the eigen-frame, hence xy = xz = yz = 0), if optimize=true the associated polarizable volume will be matched iteratively and the resulting set of polar sites written to mpsfiles.output">2.3191 0.0 0.0 2.3199 0.0 2.3204</molpol>
-			<tolerance help="relative tolerance when optimizing the polarizable volume">0.00001</tolerance>
-		</target>
-	</molpol>
-</options>
diff --git a/tutorials/GROMACS/Methane/QC_FILES/g09/cation_geo/polar/molpol.xml~ b/tutorials/GROMACS/Methane/QC_FILES/g09/cation_geo/polar/molpol.xml~
deleted file mode 100644
index 6f9757e..0000000
--- a/tutorials/GROMACS/Methane/QC_FILES/g09/cation_geo/polar/molpol.xml~
+++ /dev/null
@@ -1,20 +0,0 @@
-<options>
-	<molpol help="Molecular polarizability calculator (and optimizer)" label="tool:molpol">
-		<mpsfiles>
-			<input help="mps input file">CH4_h.mps</input>
-			<output help="mps output file">CH4_h.mps</output>
-			<polar help="xml file with infos on polarizability tensor">output.xml</polar>
-		</mpsfiles>
-		<induction>
-			<expdamp help="Thole sharpness parameter">0.39000</expdamp>
-			<wSOR help="mixing factor for convergence">0.35000</wSOR>
-			<maxiter help="maximum number of iterations">1024</maxiter>
-			<tolerance help="rel. tolerance for induced moments">0.00001</tolerance>
-		</induction>
-		<target>
-			<optimize help="if 'true', refine atomic polarizabilities to match molecular polarizable volume specified in target.molpol">true</optimize>
-			<molpol help="target polarizability tensor in format xx xy xz yy yz zz (this should be in the eigen-frame, hence xy = xz = yz = 0), if optimize=true the associated polarizable volume will be matched iteratively and the resulting set of polar sites written to mpsfiles.output">1.4451 0.0 0.0 2.0267 0.0 2.0267</molpol>
-			<tolerance help="relative tolerance when optimizing the polarizable volume">0.00001</tolerance>
-		</target>
-	</molpol>
-</options>
diff --git a/tutorials/GROMACS/Methane/QC_FILES/g09/neutral_geo/polar/molpol.xml~ b/tutorials/GROMACS/Methane/QC_FILES/g09/neutral_geo/polar/molpol.xml~
deleted file mode 100644
index b1444a7..0000000
--- a/tutorials/GROMACS/Methane/QC_FILES/g09/neutral_geo/polar/molpol.xml~
+++ /dev/null
@@ -1,20 +0,0 @@
-<options>
-	<molpol help="Molecular polarizability calculator (and optimizer)" label="tool:molpol">
-		<mpsfiles>
-			<input help="mps input file">CH4_n.mps</input>
-			<output help="mps output file">CH4_n.mps</output>
-			<polar help="xml file with infos on polarizability tensor">output.xml</polar>
-		</mpsfiles>
-		<induction>
-			<expdamp help="Thole sharpness parameter">0.39000</expdamp>
-			<wSOR help="mixing factor for convergence">0.35000</wSOR>
-			<maxiter help="maximum number of iterations">1024</maxiter>
-			<tolerance help="rel. tolerance for induced moments">0.00001</tolerance>
-		</induction>
-		<target>
-			<optimize help="if 'true', refine atomic polarizabilities to match molecular polarizable volume specified in target.molpol">true</optimize>
-			<molpol help="target polarizability tensor in format xx xy xz yy yz zz (this should be in the eigen-frame, hence xy = xz = yz = 0), if optimize=true the associated polarizable volume will be matched iteratively and the resulting set of polar sites written to mpsfiles.output">2.3191 0.0 0.0 2.3199 0.0 2.3204</molpol>
-			<tolerance help="relative tolerance when optimizing the polarizable volume">0.00001</tolerance>
-		</target>
-	</molpol>
-</options>