This seems to be fixed in 1.2.1 .
same, I have tried putting files in a subfolder in collections and they do not appear in the app.
I would expect Antiquity to appear in the same place as Aircraft/City etc.
Adding custom tiles to a folder under the Collections folder (after extracting the zip) do not show up in Asset Forge.
The ReadMe states it should be in the Collections folder next to the executable or app. However this does not appear to work. I assume they are not supposed to be in the .app folder itself?