If you encounter difficulties downloading and installing ACDSee Ultimate via the web installer, you can download the installation file directly, and then run it to start the installation.
Please note that ACDSee Ultimate is a 64-bit version only.
Following are the download links:
ACDSee Photo Studio Ultimate 2019
ACDSee Photo Studio Ultimate 2018
ACDSee Ultimate 10 64-bit
ACDSee Ultimate 9 64-bit