The Trial edition can be downloaded here:
To download an application, click the appropriate download link and save the installer file to your computer. A security warning may be presented when downloading or installing a file from the Internet. Security options can be imposed and controlled by the browser, OS, firewall or anti-virus software. For example, on Mac OSX, go to the security panel of your System Preferences and make sure the Allows Apps downloaded from anywhere option is selected.
Double-click the installer file and follow the onscreen instructions to install the application. To uninstall on Windows, choose the application name in the Control Panel. To uninstall on Mac OS X, simply drag the folder from the Applications folder to the trash.
When launching the first time on Mac, select the application, hold down the Control key and choose Open from the popup menu. On Windows 8 SmartScreen might present a dialog that requires you to click More Info, then click Run Anyway.