Transonymizer (Windows 10). This tool is intended to edit large amounts of textual files in one go by replacing strings (words) by other strings. The list of substitutions can be saved in a file and the entire replacement -provided that it has an inverse- be reverted to the original. Works recursively (i.e. on folders + subfolders) as well as on individual files. You can optionally administer wildcards and utilize the commandline for scripting purposes. A pro version is forthcoming that, for a small one-time fee, offers the ability to use regular expressions. After download and installation, press F1 for help.