Hi, I'm not quite sure as to the relevance of the linked word "workspace"?
Here is a link to download Twine: http://twinery.org/
It can be downloaded on Windows in Version 2.2.1 or 1.4.2 via the yellow post-it note on the right-hand side of the page.
Alternatively, you can use it online and save your work locally by selecting "Publish to File".
If this isn't what you mean, feel free to reply with further clarification.