IdeaVim for Rubymine 7.1.4 stopped working after updating RM

I tried updating RM 7.1.4 to the RM 8.0 Kusunoki.  IdeaVim plugin didn't work on RM 8.0 .

So, I revereted back to RM 7.1.4 and now IdeaVim stopped working there also.  It used to work on RM 7.1.4 until this afternoon.

How could I get it to work again?


Thanks,
Kannan