How do I download all files from multiple Transifex projects so as to make backup of the files without having to use the web interface and making a lot of clicks?
You can achieve that using the transifex-client and its tx set --auto-remote <project_url> feature. Once you have setup the project, you can run a tx pull -a to download all the translations. Reference: http://docs.transifex.com/developer/client/remote