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FNR - Open Source Tool for Find and Replace Strings in Multiple Files

Eric Popivker has posted a great little tool to this site, which you can use to find and replace strings in multiple files. It allows you to run RegEx searches. The layout is very simple and clear:

Its most unique feature is that it will generate a command line script that you can run from a batch file. With the basic format to start with you can elaborate the script to account for multiple terms and then run it from a batch file. Just copy the script into a new .txt file, change the extension to .bat and double-click it. So a script to replace multiple strings would look like this:

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