Solve VIM NERDTree: 1 invalid bookmarks were read

I started to use vim. Although I don’t really get the essentials of vim yet, I like this editor very much. One of my favorite plugin is called NERDTree.

I encountered an annoying problem yesterday. NERDTree complained that “invalid bookmarks were read”.

This is because NERDTreeBookmarks still keep the cache even bookmarks already deleted from vim.

Here is a quick solution. Just delete NERDTree cache by: