Hello,
I like Luminar 3 for processing jpegs. It is fast, easy and not too complex. On my PC jpgs are assigned to Luminar 3.
I can open one jpg marked in Imatch for processing in Luminar.
But I fail opening several jpegs for processing them in Luminar, for example to change wrong white balance. In Luminar, you change white balance in one file and sync the new settings to the others jpegs. Very handy!
I can't manage this work with IMatch as starting point.
An I can't move the selected file thumbnails in IMatch to the Luminar pictogram at the bottom bar (Windows).
This sounds as if Luminar does not support the standard Windows drag & drop protocols.
Can you drag several files from Windows Explorer to the Luminar task bar icon? Or the Luminar window when it is running? If so, it should also work in IMatch.