Membership Plugin Menu Option Disappeared

Hi,

I was using the membership plugin and all of sudden the membership option doesn't show up in my left menu options.

All of the pages associated with the membership plugin is in tact. When i go under plugins I see that the plugin is activated but none of my options are available. when i go to configure membership plugin it tells me that i do have permission even though i am the only admin on the site. Please help. I dont want to delete the plugin and reinstall it completely because i have two many paid members already I am hoping it is a simple file fix.