diff --git a/de.hftstuttgart.energycomponents.application/.classpath b/de.hftstuttgart.energycomponents.application/.classpath
index 1f0469022c306ea5fefe4b29b6d0eee95d3db009..d116359246ee6800ba985bf91b14957149f7db34 100644
--- a/de.hftstuttgart.energycomponents.application/.classpath
+++ b/de.hftstuttgart.energycomponents.application/.classpath
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-15"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src/"/>
 	<classpathentry kind="output" path="target/classes"/>
diff --git a/de.hftstuttgart.energycomponents.application/src/de/hftstuttgart/energycomponents/app/handlers/AboutHandler.java b/de.hftstuttgart.energycomponents.application/src/de/hftstuttgart/energycomponents/app/handlers/AboutHandler.java
index 806a7acba0daebb04ff301fbfa67eae07cd8b9e1..dbfa919e8b27b8b8ecd40268ac617639c22a89f3 100644
--- a/de.hftstuttgart.energycomponents.application/src/de/hftstuttgart/energycomponents/app/handlers/AboutHandler.java
+++ b/de.hftstuttgart.energycomponents.application/src/de/hftstuttgart/energycomponents/app/handlers/AboutHandler.java
@@ -7,6 +7,18 @@ import org.eclipse.swt.widgets.Shell;
 public class AboutHandler {
 	@Execute
 	public void execute(Shell shell) {
-		MessageDialog.openInformation(shell, "About", "Energy Components Catalog");
+		String txt = """
+				Energy Components Catalog by Verena Weiler, Stuttgart, is licensed under CC BY-NC-ND 4.0
+
+				This work is supported by projects “SimStadt 2.0” [grant number 03ET1459A] and
+				”NEQModPlus” [grant number 03ET1618B] by the BMWi (German Federal Ministry of Economic Affairs and Energy).
+
+				Java version: %s
+				Java vendor: %s
+				java.vm.version: %s
+				java.version.date: %s""";
+		MessageDialog.openInformation(shell, "About",
+				txt.formatted(System.getProperty("java.version"), System.getProperty("java.vendor"),
+						System.getProperty("java.vm.version"), System.getProperty("java.version.date")));
 	}
 }
diff --git a/de.hftstuttgart.energycomponents.parent/pom.xml b/de.hftstuttgart.energycomponents.parent/pom.xml
index 6ebdbc722a9f7a2a31cf95099da97aceba4ce49e..c711315faeabcb21b9a5e697a7869883aa264138 100644
--- a/de.hftstuttgart.energycomponents.parent/pom.xml
+++ b/de.hftstuttgart.energycomponents.parent/pom.xml
@@ -48,11 +48,11 @@
 							<ws>win32</ws>
 							<arch>x86_64</arch>
 						</environment>
-						<!-- environment>
+						<environment>
 							<os>linux</os>
 							<ws>gtk</ws>
 							<arch>x86_64</arch>
-						</environment-->
+						</environment>
 						<environment>
 							<os>macosx</os>
 							<ws>cocoa</ws>
diff --git a/de.hftstuttgart.energycomponents.product/pom.xml b/de.hftstuttgart.energycomponents.product/pom.xml
index e3e2fd412183e4b7f6d2ac22d3e50e39ed7525af..b9369ef7cc087d29f8d390ae89e39d9c9e296618 100644
--- a/de.hftstuttgart.energycomponents.product/pom.xml
+++ b/de.hftstuttgart.energycomponents.product/pom.xml
@@ -22,7 +22,7 @@
 				<configuration>
 					<formats>
 						<win32>zip</win32>
-						<!-- linux>tar.gz</linux -->
+						<linux>tar.gz</linux>
 						<macosx>zip</macosx>
 					</formats>
 				</configuration>
diff --git a/de.hftstuttgart.energycomponents.viewmodel/.classpath b/de.hftstuttgart.energycomponents.viewmodel/.classpath
index a9f4be78775fb2ba0b07e158301ada9c3be319a1..140ee67a687f573598c16ef72216d2817519b929 100644
--- a/de.hftstuttgart.energycomponents.viewmodel/.classpath
+++ b/de.hftstuttgart.energycomponents.viewmodel/.classpath
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-15"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="output" path="target/classes"/>
 </classpath>