you can try old versions of scratch here https://scratcharchive.naleksuh.com/

This allows you to run all of them if you have the .image files:
https://squeak.js.org/run/
Another thing for 2.0:
If you can't see the downloads on the download page, try this:
1. Click the Starter Projects link, and click advanced on your browser to get past the browser warning
2. Go back to the 2.0 download page
3. Refresh