Need to update agent used in our Tomcat install

Hello,

It's been over a year since we updated our agents installed on our Windows Tomcat  instances. Which agent I need to download to get the most current version?

Contents of the currently installed appagent.jar MANIFEST.MF file:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_39-b04 (Sun Microsystems Inc.)
Implementation-Vendor: AppDynamics Inc.
Implementation-Version: Server Agent v3.8.4.0 GA #2014-06-30_13-26-26
r5dc2d8d219673e698b0b455657ac469bc8b59337 4-3.8.4.next

Contents of the currently install javaagent.jar MANIFEST.MF file:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_39-b04 (Sun Microsystems Inc.)
Implementation-Vendor: Appdynamics Inc
Implementation-Version: Server Agent v3.8.4.0 GA Build Date 2014-06-30
13:33:39
Premain-Class: com.singularity.ee.agent.appagent.AgentEntryPoint
Main-Class: com.singularity.ee.agent.appagent.AgentEntryPoint
Agent-Class: com.singularity.ee.agent.appagent.AgentEntryPoint
Boot-Class-Path: javaagent.jar
Can-Redefine-Classes: true
Can-Retransform-Classes: true

Any help is appreciated, thank you!