If you are using the remote.it web portal at https://remote.it to connect to your remote Devices, you do not have to install any software on your client PC, allowing you to use any computer with a browser and an internet connection. This type of connection is called a "proxy" connection as the data passes through one of remote.it's proxy servers.
To make a quick connection, select the "Devices" view and click on the green "Connect" button next to the name of the Device which you would like to connect to.

Depending on the application, you will either:
a) Be taken to the web page in the case the connection type is http
b) Show connection information in the formal of hostname and port, which can be used in your client application.
SSH
VNC
Remote Web Admin Panel