Failed to start the MariaDB Service after using HeidiSQL

Hello,
I have the issue that the MariaDB service doesn't start anymore. After I changed the password for the root user, through HeidiSQL, the MariaDB service just stopped running and wont start anymore. I had nearly the same issue a few weeks back when I executed a Truncate Table, through HeidiSQL.
The following errors are in the Eventlog from Windows: "mysqld.exe: Can't create/write to file '.\ddl_recovery.log' (Errcode: 13 "Permission denied")" and "DDL_LOG: Failed to create ddl log file: .\ddl_recovery.log". The errormessage leads me to the conclusion that it is a problem of user rights but I tried running the service as a diffrent user and I gave the user full access rights to the directroy the file is in. So this couldn't be the problem.
Are there any known issues with HeidiSQL? And can someone help me fix the issue?