Image replace option is missing in the latest 3.0 version.
How to replace old image with the new one keeping all the image settings same?
it was a good option in 2.3.7 version.
In the latest Beta release 3.0.1-22 (available at my.sparkol.com), the replace image feature has been disabled as there were issues with it that we have been unable to fix. The feature is due to be replaced in 3.0.3.