No Highlighting in RPG

Coworker installed WDSC 4.0 and applied SP2.  She then started
working thru a tutorial.

She started the Code Editor, then opened \WDSC\SAMPLE.RPG. It isn't
color coded and prompting doesn't work.

If she clicks Options/Associations/Source Types, in the Language
profile window RPG400 does not show up.

If she opens \WDSC\SAMPLE.C it is color coded.

Bringing up the WDSC directory in Windows Explorer and double
clicking on SAMPLE.RPG doesn't open the code editor.  It should.

She says she hasn't installed any other software since installing
WDSC, nor done anything "funny" in it.

Any ideas what could have gone wrong?  (Default option is to
uninstall and re-install WDSC and then service pack, but it takes a
while.)

Sam