Download the Disk Doctor Upgrade Utility from the Releases tab, and decompress the downloaded ZIP archive.

Afterwards, run upgrade.bat as an administrator on a Windows machine (Windows S mode is not currently supported).

Then, press any key to begin the upgrade wizard.

Type in the drive letter for your Disk Doctor flash drive, followed by a colon (no spaces), and then press ENTER or RETURN on your keyboard. For example, drive letter D would be typed as D: in the wizard.

Next, sit back and relax while the utility performs the upgrade to the latest version of Disk Doctor. This should take less than a minute.

Finally, press any key to close the wizard. Your Disk Doctor flash drive has been upgraded successfully.