Index: /applications/editors/josm/nsis/launch4j.xml
===================================================================
--- /applications/editors/josm/nsis/launch4j.xml	(revision 14516)
+++ /applications/editors/josm/nsis/launch4j.xml	(revision 14517)
@@ -19,5 +19,5 @@
     <dontUsePrivateJres>false</dontUsePrivateJres>
     <initialHeapSize>16</initialHeapSize>
-    <maxHeapSize>256</maxHeapSize>
+    <maxHeapSize>512</maxHeapSize>
   </jre>
 </launch4jConfig>