If you are using Windows XP: Quit Skype. In the system tray at the bottom right of your screen, right-click the Skype icon and select Quit. Click Start > Run. Type %appdata%\skype into the Run...
No, you do not have to have a skype webcam to use skype. In fact, you don't have to have any webcam to use skype. You can make voice calls if you have a microphone, and you can chat regardless....