diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
index 6963cb9c..d87400c6 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
@@ -140,7 +140,8 @@ public static final class Config {
         public boolean isWarningMissArchJava;
         public boolean enabledProGuard;
         public boolean stripLineNumbers;
-
+		public boolean deleteTempFiles;
+        
 		public String startScript;
 
 
@@ -576,9 +577,11 @@ private void generateConfigIfNotExists() throws IOException {
         newConfig.whitelistRejectString = "Вас нет в белом списке";
         
         newConfig.threadCoreCount = 0; // on your own
+        newConfig.threadCount = JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors() >= 4 ? JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors() / 2 : JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors();
+        
         newConfig.enabledProGuard = true;
         newConfig.stripLineNumbers = false;
-        newConfig.threadCount = JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors() >= 4 ? JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors() / 2 : JVMHelper.OPERATING_SYSTEM_MXBEAN.getAvailableProcessors();
+        newConfig.deleteTempFiles = false;
         // Set server address
         LogHelper.println("LaunchServer address: ");
         newConfig.setAddress(commandHandler.readLine());
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
index 24f3fae7..d2439615 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/JARLauncherBinary.java
@@ -54,12 +54,13 @@ public void build() throws IOException {
             long time_task_end = System.currentTimeMillis();
             long time_task = time_task_end - time_this;
             time_this = time_task_end;
-            if (isNeedDelete) Files.delete(oldPath);
+            if (isNeedDelete && server.config.deleteTempFiles) Files.delete(oldPath);
             isNeedDelete = task.allowDelete();
             LogHelper.subInfo("Task %s processed from %d millis",task.getName(), time_task);
         }
         long time_end = System.currentTimeMillis();
-        IOHelper.move(thisPath, syncBinaryFile);
+        if (isNeedDelete && server.config.deleteTempFiles) IOHelper.move(thisPath, syncBinaryFile);
+        else IOHelper.copy(thisPath, syncBinaryFile);
         LogHelper.info("Build successful from %d millis",time_end - time_start);
     }
     
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/api/AttachJarsTask.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/api/AttachJarsTask.java
index 7cce6d99..ab653eb4 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/api/AttachJarsTask.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/api/AttachJarsTask.java
@@ -51,7 +51,7 @@ private void attach(ZipOutputStream output) throws IOException {
 			ZipEntry e = input.getNextEntry();
 				while (e != null) {
 					String filename = e.getName();
-					if (exclusions.stream().noneMatch(exc -> filename.startsWith(exc))) {
+					if (exclusions.stream().noneMatch(filename::startsWith)) {
 						output.putNextEntry(IOHelper.newZipEntry(e));
 						IOHelper.transfer(input, output);
 					}