Joel,
You'll have to compile and install from source. This shouldn't require reinstalling the Python interfaces.
scons build python_package=none python3_package=n f90_interface=n matlab_path=/path/to/matlab/RXXy
Once the build completes, type
sudo scons install
to install to the default /usr/local directories. If you want to install into a non-root location, you can add the prefix option to the build line (e.g., prefix=/home/user/directory after the matlab_path) and then you won't need sudo.
Hope it helps,
Bryan