By default, on a machine that has DSM Software Catalog installed, if the keys CTRL + ALT + C are pressed, the UI is opened.
In some cases this can enter into a conflict to other apps installed on the same machine, in this article is explained how to change this shortcut.
Client Automation 14.x
The shortcut key is managed by the configuration of the shortcut itself. In order to modify it (or delete it), this can be made directly on the DSM Software Catalog shortcut, the path to it is shown here: