krinnicam version 2 includes a setup wizard that automates the installation process. Just follow the steps. To uninstall, go to the "Add/Remove Programs" applet.
krinnicam version 1 is packed in a .zip file that you should decompress to any folder (e.g., under C:\Program Files\krinnicam). There is no "setup" process, just double-click on krinnicam.exe and the application should start. You can optionally create a shortcut of krinnicam.exe in your desktop or Start menu if you want. To uninstall, just remove the folder you created during the installation of krinnicam, with all its contents.