Creating Undo/Redo Files

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Undo/Redo files can be created only from Comparison window by clicking Save to Undo files or Save to Redo files button. These *.REG file is created in text format required by your system.

*.REG file begins with DELETE section, which is followed by ADD section
Delete section of Undo.REG file contains Keys and Values, which will be removed from the Registry, found in the New copy and not found in the Old one.
Add section of Undo.REG file contains Keys and Value Names found in the Old copy and not found in the New one, as well as Value Data from the Old copy modified in the New one.

Redo files are created in the same way, but their function is reverse.
Delete section of Redo.REG file contains Keys and Values, which will be removed from the Registry, found in the Old copy and not found in the New one.
Add section of Redo.REG file contains Keys and Value Names found in the New copy and not found in the Old one, as well as Value Data from the New copy modified in the Old one.

CAUTION! Use Undo/Redo files to modify the Registry only when it is absolutely necessary, having checked them before, if possible. Make sure you’ve backed up the Registry files (system.dat, user.dat, system.da0, user.da0) before using Undo/Redo files.