Create a star with rounded edge

Hi,

Good day to everyone.

Yesterday one of my friend asked me how to create star with round edge as opposed to pointed edge. Quite fascinated by his challenge I started my beloved CorelDraw and drew a star with 40 spikes at a depth of 10. Since the stars have pointed edge, I used the Filler tool to round-off the sharp edges, I was successful, but the fillet tool also rounded off the lower (inside) node. hence I failed, to create what my friend had challenged.

 One option is to create a star, then painfully select only the outer nodes and use the fillet tool to round off the edges. Is there any other easy method of doing the same in CorelDraw.

( My friend apparently uses the rival program Adobe Illustrator  and mocks me using CDR )

Thanks in advance,
Best Regards,
S. Sakthivel