How to upgrade Collector Agent(CA) and Terminal Service agent(TSagent)

Hi,    I research how to upgrade Fortinet's products. The list is follwoing;

　 Name                Current       Future

1. Fortigate 1000D ver5.4.5 ⇒ ver6.2.1(latest version)

2. Fortigate 300D   ver5.4.5 ⇒ ver6.2.1(latest version)

3. FortiAnalyzer      ver5.4.2 ⇒ ver6.2.1(latest version)

4. Collector Agent   ver5.4.?  ⇒ ver6.2.1(latest version)

5. TS agent            ver5.4.?  ⇒ ver6.2.1(latest version)

The above devices are working without problems.

I could find the method about above 1~3 in Fortinet document library.

But I could not find the documents about above 4,5.

Is there upgrade method about above 4,5 ?

  appreciate any help.

Ken