How to change RKWard's search path to R backend

[mark allyn]

Hello,

I've looked all over the internet for an answer to the Subject query 
without success.  Hopefully, you experts can set me straight.

I'm running ubuntu 14.04 32 bit machine with ARKward 0.6.1 version. When 
I invoke RKWard it searches and finds R version 3.0.2 installed at 
/usr/bin.  This is an old version of the backend.  I have a 3.2.2 R 
version installed at /usr/local/bin.  It functions superbly in console mode.

How can I set RKWard's search path so that it finds the version at 
/usr/local/bin?

Thanks,
Mark Allyn