Free and easy ithmb file converter?

I have a Mac and was storing all of my iPod and iPhone pictures on iPhoto. Last week I had to re-image my Mac so I stored all of my photos on a Seagate external hard drive. When I put all of my files and pictures back on all of the ones I had on iPhoto show up as ithmb files. Is there a free/ easy converter I can use to get all my photos back?

Here is a free and very small converter.

It will take all your.ithmb files and let you open them like a.jpg

http://ge.tt/1u4WAWa/v/0