Intellj IDEA cursor becomes insert cursor state

The Intellj IDEA cursor is in the insert state, and the content cannot be deleted.
I used to use the community version of IDEA. Today, I installed version 14. After importing the project, I found that the cursor to open the Java file is the width after pressing the insert key in the win system. the cursor, and the content cannot be deleted, and pressing the delete key, the cursor moves forward, but the content is not deleted. After a long period of pondering, it is found that it is the problem of the plug-in plugins! The
solution is as follows:
open the file -> settings  Click on Plugins and then enter IdeaVim in the search box on the right, after the results come out, uncheck the check box in the back.