Start up the program installation and follow the instructions of the Installation Wizard..
At the step of selecting packages for installation, open the Text package group and mark the package Catdoc for installation:
Complete the installation according to the instructions of the Installation Wizard.
In the administrative section of the product, please open the settings page of the Intranet module (Settings > System settings > Module settings > Intranet) and go to the Search tab. Change paths to *.exe files according to their location chosen during the installation of Cygwin: