Fieldable Panel Panes Bundles (Fieldable Panel Panes UI) - module that helps to create bundles of the Fieldable Panels Panes entity. The project aims to simplify developers life by way of refraining of writing the code for panels creation.
This module will help you get your content types out of features, and back into the database in a state where you can edit or delete them freely.
How to use:
1) Disable the feature (module) that owns your content type
2) Enable this module
(make sure you have permission to administer content types)
3) Visit admin/config/development/unfeaturize
4) check the boxes for the content types you'd like back
5) click the "Unfeaturize" button.