Hello,
I was checking manually the updates and compare database.
There is many missing things since 1.4. Some tables are missing and now upgrade show errors.
So i will try to install 1.7 fresh and copy database manually.
There are some modules:
https://github.com/ets-soft/prestashop-migrator-free-version
but i will do it manually.
When you have some experience about manual update (database) or migration tools please let me know.
Thank you for your answers.