# Reverting to a previous Toolbox version

As you upgrade the Toolbox, previous versions of the Toolbox are kept in a history. To revert to a saved version:

1. Click Help > About and then click Installation Details... to open a dialog.
2. Click the Installation History tab to see a list of previously saved versions. Selecting the date in the upper list will show you what version was installed in the bottom list. When you have found the version to which you want to revert, click Revert.
3. Click Yes when asked to exit and restart the Toolbox for the changes to take effect.

If you reinstall the Toolbox manually from a zip file, you cannot revert to a previous version.

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