you should create symbolic links to g++ in several places
First find every g++33 occurrence
after that add a symbolic link to ever g++ occurrence with ln -s
I'm guessing g++33 would be at least in /usr/bin
and here's a example
#Let's say whereis found g++33 in /usr/bin
$sudo ln -s /usr/bin/g++33 /usr/bin/g++
go and ln -s ever occurrence of g++33 similar to the example and you will be fine.