How to Use Regular Expressions in Redirection Plugin?

Hey. I’m a newbie. I just moved in from a blogger to wordpress. I had near 80 posts in blogger. And the permalinks in blogger is something like this: myblog.com/2015/04/blah-blah.html.

As I have moved in to wp, I’ve kept that custom permalink. But I want don’t want to use this structure. Is there any way to redirect all posts with this permalink structure – myblog.com/2015/04/blah-blah.html to myblog.com/blah-blah via the redirection plugin??