If you need a new download ID, you can always do it yourself as explained in the FAQ on how to get the latest version.
www.jms2win.com/en/faq/faq-joomla-multi-sites#cat-122
Concerning the download of the SSI for domains extension some antivirus may detect some peace of code that we are using as a security alert. This is a false alert.
If you encounter such issue with you anti-virus, try disabling temporarly before proceeding to the download.
If you still does not arrive to download, you can still send us an email.
We will send you the zip as a text file to try bypass your email anti-virus.