Membership Plugin Levels NOT Saving

Membership Levels and Subscription levels not saving. (very strange)

I installed the plugin and set everything up. Later I "upgraded" to the free version. Whoops, so I deleted the free version and reinstalled the premium version - again resetting everything up.

Every time I "add" a level or a "subscription" - neither one will save.

I've deleted and reinstalled the plugin to no avail : (

Any ideas?

I'm happy to give you access to the site.