Noob, how do I import png from procreate to toon boom?

I have just downloaded essentials and done the beginners module one. I was able to import the example files, but then tried to import a background I have drawn from procreate which consists of PNG files. When I import the files into the computer they have file names like this: untitled-artwork-11. So when I import using the methods outlined in the tutorial, it seems to be having an issue of some kind with the naming of the files. Is there a way to control A highlight all the files and give them a name that toon boom accepts? Doesn’t Toon Boom accept PNG files from procreate? I sure hope so. Anyway, this is a first day sort of question, I appreciate everyone’s time and patience. Thank you