I hear ya.
Try this, go to the Scubaboard photo gallery, select upload photos, browse your computer to find the pix you want to ID, and upload.
After that is completed, start a new thread in Name that Critter. When you start your thread, you will see a box on the right side of your post that says "my pics", hit open, and you should see the pix you uploaded in the pop up window.
Click the picture that you want to show up in the post and then it should show up in your post.
Another way if you don't want to upload is just add your picture as an attachment in your thread, use go advanced options and find the attachments option with the little paper clip icon. You might have to reduce the size for that to work, I think the max size is 200K for one pic, 100K per for multiple attached pix in one post. This is off the top of my head, I hope I got it right...
I hope that helps, it took me a while to figure it out too. Otherwise, hopefully support will give you clearer info soon. I do look forward to seeing what you have...