Module Option Thumbnails Missing

I LOVE this slideshow! Thanks to the creators!!

I set things up and all was fine. I added 29 images from a subfolder of the default images directory. All worked fine. I set this up on my localhost on my local machine, then uploaded all the files and database to my hosting service. All works fine, but the thumbnail images that were in the Options tab of the module have disappeared. If I delete the image and re-add the image then the thumbnail re-appears. I REALLY don't want to do this to all 29 images, and it seems that there should be a simple fix for this, but I don't know what it is. See attached image. Any thoughts?

Just for clarification, EVERYTHING is working great on the front end, and all else works perfectly.

Hi
this is just the preview, yes it can be a problem because you have imported the data from another website and then the images url is no more correct.
I will see how to improve this in the future
CEd

Thanks for responding CEd. Is there anywhere that I can go to manually change the url?

Also.... any way to change the shape of the preview image? It squishes the image.

Thanks again!

this is an admin layout and is not designed to be changed. The url is stored into the database param field, but encoded in json ...
I think it will be faster to reselect the images