another reply to myself : i’ve been using successfully this : https://interconnectit.com/products/search-and-replace-for-wordpress-databases/
don’t forget to update the ownership & rights eventually to folders & files after unzip.
After use, be careful not to leave this piece of code available on a production server…
I reply to myself : it is actually worse than I thought. Even the version 3.1.0 does not work properly, even if it says there are 200+ cells to be updated, it actually does not update all of them, but only some parts. Also, the “import sql” function does not work properly.
The importation is very quick, so I guess there are some errors happening and it updates only very few occurrences.
I’m presently stuck and look for alternative solution. If anyone know some, let me know !
Thanks