Please click the below link, Current version is 3.9.0. Below three Windows links have the same installer so choose only one, please choose the one which results in a faster download speed.
For Windows
Here is 1st Windows download link Pixbim Color Surprise AI Free Download - Preferred one as it downloads faster
Here is 2nd Windows download link Pixbim Color Surprise AI Free Download
Here is 3rd Windows download link Pixbim Color Surprise AI Free Download
For Mac
Pixbim Color Surprise AI Download for Apple Mac OS
Tutorial on Pixbim Color Surprise AI