Hello; I want to Upgrade my Cisco ASA5516X Firepower (FMC)'s 6.2.2 to 6.4.0.9 version; I want to ask: Is this a risky process, if upgrade fails is my device or FMC software lost. Thanks...

 We bought Anyconnect license but when we contact licensing team to help us, a person said to us Anyconnect License doesn't work on our system (see above pls) but Another person in licensing team said to us it will work, which is true, we are very co...