Yesterday, I created and animated a new Scene in Anime Studio and imported a .psd Photoshop file for the Animation's image assets.
After animating it all, I deleted the original .psd file to clean things up.
Today, I opened up the Anime Studio Document to find all the image assets replaced by the "image could not be found" clip art icon. Everything is still animated with keyframes, but the art is gone. This lend me to suspect that the AS file updated itself when I deleted the .psd file.

Is there any way to get the images back (is there an option to "un-update the .psd file")? And is there a way to stop AS from updating itself every time I delete/edit a .psd file so this doesn't happen again?
Also, does this automatic update feature still happen if you import .jpg/image files or AS objects as well?