Crowd Favorite is usually great about updating bugs in there plugins. I ran in to the same problem with editing the slug on pages, posts were fine but if i wanted to change the slug on a page when i clicked the edit button nothing would happen. If i want to continue to use the Tagaroo plugin I have to deactivate it when i want to edit page URL slugs.
For your problem i believe if you set the plugin, from the setting link in the sidebar, to automatically fetch images and tags when creating a post, it should automatically populate the image field without having to click the arrow to make it drop down.
You can aways use the plugin Simple Tags, it allows you to use the same OpenCalias API key that you use in Tagaroo.
