TechnitiumSoftware-DnsServer/Apps/QueryLogsSqliteApp/dnsApp.config

{
  "enableLogging": true,
  "maxLogDays": 7,
  "maxLogRecords": 10000,
  "useInMemoryDb": false,
  "sqliteDbPath": "querylogs.db",
  "connectionString": "Data Source='{sqliteDbPath}'; Cache=Shared;"
}