Index: /applications/editors/josm/plugins/pdfimport/src/pdfimport/LoadPdfDialog.java
===================================================================
--- /applications/editors/josm/plugins/pdfimport/src/pdfimport/LoadPdfDialog.java	(revision 24018)
+++ /applications/editors/josm/plugins/pdfimport/src/pdfimport/LoadPdfDialog.java	(revision 24019)
@@ -509,4 +509,5 @@
 		if (this.layer != null) {
 			Main.main.removeLayer(this.layer);
+			this.layer.data.clear(); //saves memory
 			this.layer = null;
 		}