Umbra, you can create sandboxed shortcuts for your browsers, that way when yo click on them, the browser opens in the default sandbox or the sandbox of your choice. Also, start using a sandboxed Windows Explorer to navigate to your download folder, USB drive, etc.
Using the sandboxed Explorer and the shortcuts don't bring the free version up to the level of the paid version but makes it easier to open the browsers and your PC is safer when you open downloads, USB drives sandboxed.
Bo.