diff --git a/pom.xml b/pom.xml
index 4c03eb41..a92e9cc8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.pamguard</groupId>
   <artifactId>Pamguard</artifactId>
-  <version>2.02.05</version>
+  <version>2.02.05a</version>
   <name>Pamguard Java12+</name>
   <description>Pamguard for Java 12+, using Maven to control dependcies</description>
 	<url>www.pamguard.org</url>
diff --git a/src/PamController/PamguardVersionInfo.java b/src/PamController/PamguardVersionInfo.java
index 01258c63..270b31df 100644
--- a/src/PamController/PamguardVersionInfo.java
+++ b/src/PamController/PamguardVersionInfo.java
@@ -31,12 +31,12 @@ public class PamguardVersionInfo {
 	 * Version number, major version.minorversion.sub-release.
 	 * Note: can't go higher than sub-release 'f'
 	 */
-	static public final String version = "2.02.05";
+	static public final String version = "2.02.05a";
 	
 	/**
 	 * Release date
 	 */
-	static public final String date = "21 October 2022";
+	static public final String date = "11 November 2022";
 	
 //	/**
 //	 * Release type - Beta or Core
diff --git a/src/PamguardMVC/PamDataBlock.java b/src/PamguardMVC/PamDataBlock.java
index 20d6aedb..e0c3b9f7 100644
--- a/src/PamguardMVC/PamDataBlock.java
+++ b/src/PamguardMVC/PamDataBlock.java
@@ -65,6 +65,7 @@ import PamDetection.LocalisationInfo;
 import PamUtils.PamCalendar;
 import PamUtils.PamUtils;
 import PamView.symbol.PamSymbolManager;
+import PamguardMVC.background.BackgroundDataBlock;
 import PamguardMVC.background.BackgroundManager;
 import PamguardMVC.dataOffline.OfflineDataLoadInfo;
 import PamguardMVC.dataOffline.OfflineDataLoading;
@@ -944,6 +945,12 @@ public class PamDataBlock<Tunit extends PamDataUnit> extends PamObservable {
 				recycledUnits.clear();
 			}
 		}
+		if (backgroundManager != null) {
+			BackgroundDataBlock bdb = backgroundManager.getBackgroundDataBlock();
+			if (bdb != null) {
+				bdb.clearAll();
+			}
+		}
 	}
 
 	/**