Earlier this month the Kutools team rolled out a (and a refreshed activation workflow). Existing users were prompted to “update your license key” the first time they opened the add‑in after the update.
If activation fails with “Invalid key,” double-check: kutools license key updated
To update or reactivate your license for Kutools (for Excel, Outlook, or Word), follow the steps below. Kutools typically requires re-entering your license information if you have purchased an upgrade, moved to a new computer, or reinstalled your operating system. Earlier this month the Kutools team rolled out
Open Excel. Click on the tab, then select License . If your key has been updated by the developer, you will see a button that says "Refresh License" or "Apply Update." Clicking this automatically syncs your local installation with the latest licensing server, often without requiring you to manually type a new code. If your key has been updated by the