The standard post menu has several entries: "All Posts, Add Post, Categories, Tags". I created a custom post type called Episode, and I have verified that the plural form is properly set to Episodes. I have set it up so the Episodes menu appears right below the Posts menu. When I open the menu however, I see this: "All items, Add Episode, Categories, Tags". I believe the first line in the menu should be "All Episodes", but the menu is not rendering properly. Clicking the "All items" link takes me to the correct location and I can subsequently edit individual Episodes. So I think it is just a display problem.
Yes, that solved the problem. However, the value of the "All Items" field was the hard-coded string "All items". That is wrong, it should have been set to "All %s". Your next release should have this correction.
No, you are missing the point. That string "All items" was HARD-CODED!!! That is, I received the plugin from you with that value already set that way. I'm telling you that you need to get your development team to replace the HARD-CODED string to "All %s". Then I would NOT have had the problem in the first place.