All XLS Padlock Options > Activation keys > Activation Settings > Application Master Key
Every protected workbook has a unique Application Master Key. This is what XLS Padlock uses to create keys associated to your workbook. It is strictly confidential: you should never give it to anyone. XLS Padlock automatically creates a new Master Key for each new project, but you can choose what you want.
You can click Copy to copy the key to the clipboard (useful for the stand-alone key generator).
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