Help? I'm no longer able to import pictures into TBS

I recently changed my picture default to open in Windows Picture Viewer. I think this caused an issue in TBS because now it seems it cannot locate any pictures I try selecting. Up till now, I had no trouble importing anything. If anyone can lend a clue as to what I should do to fix this, would be greatly appreciated!!

You can contact and they can help you if it is a problem with Toon Boom Studio.

I figured it out. I needed to change the picture format to Jpeg. I did so using Photoshop. Thank you for your help!