Cannot Login After Adding Store Plugin

Hi.

My blog is http://www.voiceinrecovery.com/blog/ and last week I added a plugin to create a store to sell products. I had not done any editing or modifying of the plugin yet.

Ever since I added it I have not been able to log into my profile.

When I get to this page the website is blank or gives a http 500 error message: http://www.voiceinrecovery.com/blog/wp-admin/

I wish I could delete the plugin, or make it inactive but I cannot even access the dashboard to be able to do this.

I am not sure what to do – but at this point the store plugin has sort of crashed all pages on my website. No matter what page I click on it takes me to the “products page”.

Does anyone know what I can do to delete this plugin or login? I wish I could remember which wordpress store plug in I used, but I dont and am unsure how to even look to find that info out without being able to access my dashboard.

I am not really familiar with coding, and am willing to let someone else help back door enter to help me!