To install Creately Desktop after downloading it as a zip file, you need to follow these steps:
1. Extract the contents of the zip file to a desired location on your computer.
2. Open the extracted folder and locate the CreatelyDesktop file (with a .exe extension).
3. Double-click on the CreatelyDesktop file to start the installation process.
4. Follow the on-screen instructions to complete the installation.
5. Once the installation is done, you can launch Creately Desktop from your computer.
Note: Make sure you have the necessary system requirements to run Creately Desktop before installing it.