The picture in the GSX editor is generic, and it changes only based on the number of engines of the airplane so, it's entirely normal you'll see something that looks like a 737.
The Aerosoft CRJ is supported internally by GSX so, the first thing to check, is if you are using the configuration that comes with GSX, which means the editor should say "Using Internal data". If it's not saying, that, use the Reset button, which will remove any configurations you might have made, and revert to default.