Moved DBs from MariaDB to Wampserver.MariaDB (no replies)

Hello everybody,

before installing Wampserver 3.1.7 I had MariaDB 10.1 installed.
I uninstalled MariaDB without backing up the databases.
After that I installed Wampserver.
Then i copied all databases from c:\MariaDB10.1\data into C:\wamp64\bin\mariadb\mariadb10.3.12\data.
In MyPHPAdmin I see the databases but I can not open them.

How should I proceed?

regards
Kostas