Sleep for 5s before cleaning up temp path, in case this improves reliability on Windows.

src/main/java/org/qortal/repository/Bootstrap.java

@@ -296,6 +296,7 @@ public class Bootstrap {
 
             // Cleanup
             LOGGER.info("Cleaning up...");
+            Thread.sleep(5000L);
             this.deleteAllTempDirectories();
         }
     }