The file you download and run prompts you for a destination. We do not create 
any shortcuts, since the whole bundle is designed to be portable: You can move
it freely around and for example run it from a USB stick on other computers.

If you don't remember where you extracted it (most likely your Downloads 
folder?), download again, point the extraction process at an easy to remember
location (for example your desktop), and you will find a "Tor Browser" folder
there, with a "Start Tor Browser" executable inside.

To uninstall Tor Browser Bundle simply delete the "Tor Browser" directory.