Replace string in a file

[sakurai_db]

I have a file SQLcounts_temp.cfg like in the following, I would like to replace "testinginst01" to "testinginst02", how can I do that in windows batch cmd shell ? Thanks

"\MSSQL$testinginst01atabases(*)\Log File(s) Size (KB)"
"\MSSQL$testinginst01atabases(*)\Log File(s) Used Size (KB)"
"\MSSQL$testinginst01atabases(*)\Log Flush Wait Time"
"\MSSQL$testinginst01atabases(*)\Log Flush Waits/sec"
"\MSSQL$testinginst01atabases(*)\Log Flush Write Time (ms)"
"\MSSQL$testinginst01atabases(*)\Log Flushes/sec"
"\MSSQL$testinginst01atabases(*)\Percent Log Used"
"\MSSQL$testinginst01atabases(*)\Tracked transactions/sec"

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