My computer might have a glitch from a different extension

My computer won't show my "Home" page thanks to another extension that I am currently trying to remove. I might re-download the extension after, because it is quite nice. However, I would like to able delete some of the apps that come with the extension (ex: twitter, hotmail, ect.) If there is already a way, please tell me and I will possibly get this extension back. If not, goodbye Home... Forever...