Okay, that is clear. Now, you must only decide yourself if it is really worth making those changes in Fillet command for V2, because there wasn't originally something like a wish, but only question in my message... :)
Hi Petr, I think it will be worthwhile to make this change when I can, because it will allow for filleting corner vertices on a multiple selection of numerous curves simultaneously. Right now you can only do corner vertices of a single curve at a time. It's nice to have things set up to be able to process a batch of a larger number of stuff if possible...