Komet Sales allows you to upload one picture to several items at once. The Mass Upload button will allow you to do so, you just have to make sure to find the right products before using it as this button will affect all the search results.
Here are the instructions on how to do so:
Go to Setup > Products and use the filters to find the products that you want to upload the image to.
Click on the "Mass Upload Image" button.
3. A window will appear, drag the image that you want to upload and drop it on the outlined square, then click on "Upload".
4. Finally, click on Continue to load the picture to your search results.