Importing alpha's

I have recently purchased this app and it’s great up until I decided to import alpha’s. I have read other posts and would follow their advice but unfortunately I can’t even locate the Nomad folder on my tablet let alone the alpha folder.
Am I going crazy.

Thanks to a quick response to my email to customer support the alpha folder is located in Android/data/com.stephaneginier.nomad/files for anyone else who stumbles into the same issue.
After that it was as simple as copying png files into the alpha folder.