Upgrade of both Bonita (6.4.1) and server OS (Ubuntu 14.04)

Hallo everybody.
I need to upgrade a Bonita 6.4.1 installed on an old 14.04 Ubuntu server. I would like to get some advice on what would be the best way to do it.
I think my options are:
1) Upgrade the OS to 16.04 and then to 18.04 (all LTS) and then run the migration tools of Bonita;
2) Migrate all the Bonita sw/settings to a newly installed 18.04 Ubuntu server and then upgrade Bonita with the migration tools;

[Solved]New version Bonita License

In my company, we use Bonitasoft Teamwork edition.
Today, I downloaded the 7.4.1 version, and after installation, it requires a new license, but we don't want to use up one more license key just for upgrade. I could not find how to upgrade to newer version in the old Bonita bpm.
Is there a way to upgrade to newer version of Bonita without generating a new license key?
Because the server is the same, it counts as one user. So, everything's ok now.

7.4 Migration Tool getting Unsupported major.minor version error

The hardware/software requirements for 7.4.1 indicate using either Java 7 or 8; however when I try to upgrade to 7.4.1 and run the migration tool using Java 7, I get the below error, which indicates that I need Java 8. Is that correct? That I should really be using Java 8 for 7.4.1?

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/bonitasoft/migration/core/Migration : Unsupported major.minor version 52.0

How to upgrade bonita 5.x process to 5.9 or 5.10?

Hello I'm Ami

I need to upgrade any 5.x process to 5.9 or 5.10, but I don't know how to...

Thanks before

Bonita 5.x process that has 6.x version

Hello I'm Ami

Does anybody has open source runable Bonita 5.x process which then upgraded for 6.x version?

I need to compare 2 processes after it's upgraded to know if Bonita 6.x does make a process have a better quality.

Thanks before :)