I like Brij very much, so i am posting a lessons learned.
Took a while to figure out how to save and load my deal files so they can be managed by the iPad files app.
To save a deal file (pbn) use the save and share option which will save the file to a folder that is accessible from the iPad file manager.
To load a deal file open the files app, select de deal file and then tap the share icon and then tap the Brij icon in the share sheet.