After installing JBoss Tools, some project types can not be deleted

After installing JBoss Tools*, there is no more a "Delete" item in the context menu of some projects in Project explorer.

Example:

• an "Enterprise Application Project" has no more a Delete item in its context menu ("Java EE" perspective)

Also there is no more a New submeni item in the context menu, noo matter what is clicked:

• nothing is selected
• a project
• a directory folder
• a .java file

• - Installed today from http://download.jboss.org/jbosstools/updates/development/