hmm i dont have the option to save file as .asc but i just copied and pasted one into program and it worked. altho the DA one didnt.
Yeah, I don't know what Seahorse is. I just use the generic Password and Keys that comes with Ubuntu. I have no idea why your text editor won't allow you to save as .asc. Maybe it's not a clickable option, but you should at least be able to manually write in DAPublicKey.asc when saving.