diff --git a/diylc/diylc-core/src/org/diylc/common/BuildingBlockPackage.java b/diylc/diylc-core/src/org/diylc/common/BuildingBlockPackage.java
index bf69e4e6..0466025a 100644
--- a/diylc/diylc-core/src/org/diylc/common/BuildingBlockPackage.java
+++ b/diylc/diylc-core/src/org/diylc/common/BuildingBlockPackage.java
@@ -30,6 +30,9 @@ public class BuildingBlockPackage {
 
   private Map<String, List<IDIYComponent<?>>> block;
   private String owner;
+  
+  public BuildingBlockPackage() {   
+  }
 
   public BuildingBlockPackage(Map<String, List<IDIYComponent<?>>> blocks, String owner) {
     super();
diff --git a/diylc/diylc-core/src/org/diylc/common/VariantPackage.java b/diylc/diylc-core/src/org/diylc/common/VariantPackage.java
index 32879c60..43dac280 100644
--- a/diylc/diylc-core/src/org/diylc/common/VariantPackage.java
+++ b/diylc/diylc-core/src/org/diylc/common/VariantPackage.java
@@ -30,6 +30,9 @@ public class VariantPackage {
 
   private Map<String, List<Template>> variants;
   private String owner;
+  
+  public VariantPackage() {    
+  }
 
   public VariantPackage(Map<String, List<Template>> variants, String owner) {
     super();
diff --git a/diylc/diylc-core/src/org/diylc/presenter/Presenter.java b/diylc/diylc-core/src/org/diylc/presenter/Presenter.java
index a8702158..a609e324 100644
--- a/diylc/diylc-core/src/org/diylc/presenter/Presenter.java
+++ b/diylc/diylc-core/src/org/diylc/presenter/Presenter.java
@@ -3009,7 +3009,17 @@ public class Presenter implements IPlugInPort {
     BufferedInputStream in = new BufferedInputStream(new FileInputStream(fileName));
     XStream xStream = new XStream(new DomDriver());
 
-    VariantPackage pkg = (VariantPackage) xStream.fromXML(in);
+    VariantPackage pkg;
+    
+    try {
+      // old way
+      pkg = (VariantPackage) xStream.fromXML(in);
+    } catch (Exception e) {
+      // new way
+      in = new BufferedInputStream(new FileInputStream(fileName));
+      ProjectFileManager.configure(xStream);
+      pkg = (VariantPackage) xStream.fromXML(in);
+    }
 
     in.close();
 
@@ -3048,7 +3058,17 @@ public class Presenter implements IPlugInPort {
     BufferedInputStream in = new BufferedInputStream(new FileInputStream(fileName));
     XStream xStream = new XStream(new DomDriver());
 
-    BuildingBlockPackage pkg = (BuildingBlockPackage) xStream.fromXML(in);
+    BuildingBlockPackage pkg;
+    
+    try {
+      // old way
+      pkg = (BuildingBlockPackage) xStream.fromXML(in);
+    } catch (Exception e) {
+      // new way
+      in = new BufferedInputStream(new FileInputStream(fileName));
+      ProjectFileManager.configure(xStream);
+      pkg = (BuildingBlockPackage) xStream.fromXML(in);
+    }
 
     in.close();
 
diff --git a/diylc/diylc-core/src/org/diylc/presenter/update.xml b/diylc/diylc-core/src/org/diylc/presenter/update.xml
index 2b6c717c..bfc2786e 100644
--- a/diylc/diylc-core/src/org/diylc/presenter/update.xml
+++ b/diylc/diylc-core/src/org/diylc/presenter/update.xml
@@ -3418,17 +3418,21 @@
 			<releaseDate>2020-12-28 00:00:00.000 CET</releaseDate>
 			<name></name>
 			<changes>
-				<org.diylc.appframework.update.Change>
-					<changeType>IMPROVEMENT</changeType>
-					<description>When editing component properties, group Length and Width properties together</description>
-				</org.diylc.appframework.update.Change>
 				<org.diylc.appframework.update.Change>
 					<changeType>NEW_FEATURE</changeType>
 					<description>Português translation added (thanks Pedro Rizzi!)</description>
 				</org.diylc.appframework.update.Change>	
+				<org.diylc.appframework.update.Change>
+					<changeType>IMPROVEMENT</changeType>
+					<description>When editing component properties, group Length and Width properties together</description>
+				</org.diylc.appframework.update.Change>
 				<org.diylc.appframework.update.Change>
 					<changeType>BUG_FIX</changeType>
 					<description>Rotating 'Neutrik Jack' produces rendering issues</description>
+				</org.diylc.appframework.update.Change>	
+				<org.diylc.appframework.update.Change>
+					<changeType>BUG_FIX</changeType>
+					<description>Fixed some issues with exporting and importing building blocks and variants. If you still have issues, your variant/building block files might need to be manually updated to keep working</description>
 				</org.diylc.appframework.update.Change>			
 			</changes>
 			<url>https://github.com/bancika/diy-layout-creator/releases</url>
diff --git a/diylc/diylc-library/lib/diylc-core.jar b/diylc/diylc-library/lib/diylc-core.jar
index 206838f8..58c63323 100644
Binary files a/diylc/diylc-library/lib/diylc-core.jar and b/diylc/diylc-library/lib/diylc-core.jar differ
diff --git a/diylc/diylc-swing/lib/diylc-core.jar b/diylc/diylc-swing/lib/diylc-core.jar
index 206838f8..58c63323 100644
Binary files a/diylc/diylc-swing/lib/diylc-core.jar and b/diylc/diylc-swing/lib/diylc-core.jar differ
diff --git a/diylc/diylc-swing/library/main.jar b/diylc/diylc-swing/library/main.jar
index 1ad287e3..41964622 100644
Binary files a/diylc/diylc-swing/library/main.jar and b/diylc/diylc-swing/library/main.jar differ
diff --git a/diylc/diylc-swing/src/org/diylc/swing/ActionFactory.java b/diylc/diylc-swing/src/org/diylc/swing/ActionFactory.java
index a9eee8ec..b3584c76 100644
--- a/diylc/diylc-swing/src/org/diylc/swing/ActionFactory.java
+++ b/diylc/diylc-swing/src/org/diylc/swing/ActionFactory.java
@@ -74,6 +74,7 @@ import org.diylc.netlist.Group;
 import org.diylc.netlist.Netlist;
 import org.diylc.netlist.Summary;
 import org.diylc.presenter.Presenter;
+import org.diylc.serialization.ProjectFileManager;
 import org.diylc.swing.gui.DialogFactory;
 import org.diylc.swing.gui.editor.PropertyEditorDialog;
 import org.diylc.swing.images.IconLoader;
@@ -856,6 +857,7 @@ public class ActionFactory {
             try {
               BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
               XStream xStream = new XStream(new DomDriver());
+              ProjectFileManager.configure(xStream);
               xStream.toXML(variantPkg, out);
               out.close();
               LOG.info("Exported variants succesfully");
@@ -1012,6 +1014,7 @@ public class ActionFactory {
             try {
               BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
               XStream xStream = new XStream(new DomDriver());
+              ProjectFileManager.configure(xStream);
               xStream.toXML(variantPkg, out);
               out.close();
               LOG.info("Exported building blocks succesfully");