If you encounter difficulties downloading and installing ACDSee Ultimate via the web installer, you can download the full installation file directly, and then run it to start the installation.
 

Please note that ACDSee Ultimate is a 64-bit version only.

To get download links for the legacy products, please  log into your acdID account and download from My Apps Page

For the most recent versions of ACDSee Professional, please find the download links below:
ACDSee Photo Studio Ultimate 2021
ACDSee Photo Studio Ultimate 2020
ACDSee Photo Studio Ultimate 2019