Hi everyone. Thanks for your patience. We have updated the marketplace products to support 5.1 and 5.2 now. We will work on properly documenting the Custom Image workflow, but hopefully in the meantime it is no longer necessary for most users.
We’ve also improved detection of the .exe to avoid some errors when the app was not inside a “Windows” subfolder. There may be an outstanding issue with Shipping builds where the wrong .exe is grabbed (ProjectName-Win64-Shipping.exe), so it’s safest to use a development build.
Thanks for bringing this to our awareness. We will take a look.