Image versus embedded picture

In Xojo 2015 and earlier, dragging an image into the project gets you a linked image which is ‘singular’
In 2017/2018, they are automatically turned into image sets, which then makes the project unreadable by earlier Xojo versions.

Is there a way to force a picture in Xojo 2017/2018 to be a simple picture instead of the image set?
(There is a right click option to go the other way ‘convert to image’…)

Turn “Supports Hi-DPI” to OFF before adding the images to your project.
I don’t think there is a reverse option of ‘convert to image’