Open ReMouse. Go to Help > About. Note the version number. If you have version 3.x and the latest is 5.x, you likely need an upgrade.
Solution:
If your key says "Invalid" after a Windows update, contact support at support[at]blazingtools.com. Provide your order ID. They will send you a clean updated key for free. remouse registration key upd
Solution:
If you cannot afford a license, consider legitimate free macro tools: Open ReMouse