Hello Gabriel,
The first link you mention is from an old system we no longer maintain.
The current links can be found on the website:
https://support.clarivate.com/Endnote/s/article/ka1390000008bfCAAQ/EndNote-Installer-download
The website will always have the latest build available for download.
EndNote X9 was just released and has had no incremental versions released yet so the current link is the most up to date version.