Go to https://autodesk.com and click "SIGN IN" in the top right corner. Sign into your account
Click the head icon in the top-right corner (where the sign-in button was previously located) and click "Manage products and downloads" from the dropdown menu
In the left navigation bar, click "All Products & Services"
Scroll down and expand the "Inventor Professional" section
Click "View Downloads" on the correct version of Inventor
Click "Install Now" for "Vault Basic - Client" Install the CLIENT version, not the server version
Follow the installer instructions to finish the installation