Hooray, got the device added as a legacy DTH and it’s working in ST!
No, thank you for imparting your knowledge, I couldn’t work out how to force it to use a DTH and couldn’t find any info on this until now.
For those looking for more info on the Nano Shutter, it looks like the ST edge driver will work with it if you update the firmware. See here: Aeotec Nano Shutter - Edge Driver - #5 by Adrenalin