Here is a workaround Open Batch, select all photos, select location to save, select save as jpg but then also select the most benign macro that will essentially make little to no change to your photos - such as strip metadata or perhaps a very slight auto adjustment that wouldn't change the images all that much (if at all). This will enable the "ok" button to where you can run it. Unfortunately unless you select an actual macro to apply - it will not enable the "ok" button. Which - Affinity....How hard would it be to make the export to jpg process a standard macro; and why disable the ability to macro an export? Makes no sense. Not very. Please fix. 🙂