Migration Assistant download from Apple site not appearing on my Windows 7 pc

Just got a new iMac as old pc so slow thought Mac would sit well with iPad & iPhone.

Although I can access the page to download the migration assistant, the download button is not there. Just get “download icon”.

Most frustrating and cannot find advice anywhere.

Anyone else had the same problem and found a solution?

Migration just seems much easier than a stick - if I can download it!!

Thanks in anticipation.