1. Refreshing NERDTree file list after creating/deleting/renaming file:
   • Press r in NERDTree page
2. Change NERDTree working directory
   1. Change Vim working directory using :cd <dest>
   2. Execute :NERDTreeCWD
   3. The file list should be updated as per the new working directory

Reference:

• https://stackoverflow.com/questions/8584182/how-to-refresh-in-nerdtree-plugin