thanks for your post.
Your observation is right, that option is no longer existing in TablePress. The reason is simple: Instead of just allowing to choose what user role can access TablePress, it is now possible to choose specific capabilities that a user role has. As that requires a little more user interface, I opted to not include that into TablePress, but to allow using another plugin for this.
I recommend to install the Members plugin from http://wordpress.org/extend/plugins/members/ It's "Role Manager" component allows to edit the capabilities of each user group. For each user role (like "Administrator", "Editor", or "Author"), you can specifically set what they are allowed to do, and what not. You will see several capabilities that start with the name "tablepress_".
After making your desired modifications, Members can be uninstalled again, as these changes will stick in the database.