Hi ​@Shashwat Hegde, 

Thanks for getting in touch. Assuming you have permission for the file, you should see 'Open in editor' when you click the little arrow next to the file name. Have you tried looking for that?

Or, if you accessed the design file through your browser, you could check your browser history. If you still don't see it, I'd recommend reaching out to the file owner to check your permissions.

I hope it helps! Please let us know if that doesn't solve the problem.

Thanks,
Toku