I had defined a file type for AspectJ with the registered pattern *.aj. I had configured most of the keywords there to have some coloring when looking at aspectj files. It seems I can't get rid of the file type. I had AspectJ Support plugin 0.2. I now completely removed the AspectJ support plugin, removed the file type, then installed AspectJ Support plugin 0.3, but still this file type returns in the options (and it is editable, unlike the Java sources file type for example).
Any way around this?