You could try
1. Putting the databases somewhere safe
2. Reinstalling the old version of mariadb.
3. copying the saved databases to the new install
4. Doing an export of the databases you want to keep
5. uninstall the old version again
6. Start WAMPServer
7. Reinstall the mariadb service from the wamp manus
8. import that backups
But there are no guarantee's that this would work, and it assumes you have all the files involved in all the databases currently and know what you are doing.
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(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>Read The Manuals Apache --
MySQL --
PHP --
phpMyAdminGet your Apache/MySQL/mariaDB/PHP ADDONs here from the
WAMPServer alternate Repo-X-X-X-
Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-