To disable the folder import from the Import screen, we need to disable the button "Add Folder". To do this, change the following tag from
<dmf:fileselectorapplet name="fileselector" height="250" width="400" folderselectmode="true"/>
to
<dmf:fileselectorapplet name="fileselector" height="250" width="400" folderselectmode="false"/>
in the file
\webcomponent\library\contenttransfer\importcontent\fileselection.jsp
NOTE: Dont change the JSP as it is. Instead, extend the component