[Plugin: Yet Another Related Posts Plugin] Removing OL tag

Am using YARPP 3.5.1 and I want to remove the ordered list tag and want to replace it with unordered list tag because for now YARPP shows content with numbering, and I just want to include a “small star image” before each title.

And if you could also tell me that how can I add thumbnail to it.

I use YARPP in widget area.

GREAT PLUGIN !!