I just installed the MailChimp integration plug-in. I followed all the directions and then went to Appearance - Widgets and nothing. Not only do I not see that, but I don't see the "normal" screen that shows me all available widgets and lets me drag and drop. I'm not sure if it's my WP theme I'm using that is doing this or if I installed something wrong of if something is wrong with WP.
I'm using the latest version of WP and can send a screenshot if necessary.