We have Multitrans 5.7. How can I migrate to the last version ?

We have Multicorpora MultiTrans version 5.7.

We wil migrate to the last version of SDL Multitrans.

How can I migrate ?

Where to search to the SDL website for my product ?
There is on SDL website a page for Multitrans :  https://www.sdl.com/software-and-services/translation-software/translation-management/multitrans.html

I don't find any support page for Multitrans here. Where I must search ?

Thank's a lot !

Olivier