Once you've purchased the Nucleo icons, follow these steps to unlock them:
After logging in, the Mac/Windows app will automatically begin downloading all the icons. Due to the large number of icons, this process might take a few minutes. You can still use the app while the icons are downloading.
Note: If you're connected to a company or protected network, the download may not initiate or could seem to freeze. If this happens, try connecting to a different network to complete the download.