What a mess...

I finally got around to dealing with the Manage Mobile Devices mess. For some reason (it has been noted elsewhere on forums), I have a number of duplicate devices - some with the same name! So anytime I want to send a resource to a device, I never know where it will end up. I figured I would attempt to eliminate the 'dead' ones to finally deal with the confusion. However, I accidentally deleted the appropriate resource. And from what I understand, the only way to reintroduce it to my list is to delete and reinstall app. Well, I deleted the app. And now for some reason it will not download from the app store. Sigh... It is specific to the Logos Bible app as I tried to reinstall others I have deleted. Any help??