Upgrading MariaDb

[nkamp01]

Hello,

I don't use XAMPP, I have installed my own stack: Apache, PHP, MariaDB (port 3307), MySQL (port 3306)

I had MariaDb running version 10.5.x I believe.
Last week I have upgraded MariaDB through "programms & parts" by uninstalling the programm/service of MariaDB. The question is raised "Do you want to keep you're data directory?", which I have answered with Yes and made a copy of the data directory. So I have still all my database schemas.

I have installed the new MariaDB version 11.0.2-MariaDb with msi file. This up and running and I have already installed a new Joomla version 4, which working.

But how can add\import the 'old' database schema's from the data directory from the earlier version?