FYI
Yahoo has made the decision to no longer allow users to upload content to the Yahoo Groups site. Beginning October 28 you won't be able to upload any more content to the site, and as of December 14 all previously posted content on the site will be permanently removed. You'll have until that date to save anything you've uploaded.
New group is the
https://groups.io/g/LTspice, they try to copy the content from yahoo to that new site currently.
Cross our fingers!