I think I have installed those things already a zillion times, I will check once again ...
Question : is this still correct : 
http://wiki.codeblocks.org/index.php?title=Pretty_Printers ?
EDIT : I just checked this on my main machine :
- nothing specified in "Debugger Initialization commands"
- Enable watch scripts : unchecked
and I can see perfectly the members in the below code snippet : 
#include <iostream>
#include <vector>
#include <string>
#include <set>
class Foo
{
public:
	void doSomething();
private:
	std::string mString{"front 242"};
	std::vector<std::string> mVecStrings{"no", "shuffle"};
	std::vector<int> mVecInts{2, 4, 2};
	std::set<int> mSetInts{2, 4};
};
void Foo::doSomething()
{
	std::cout << mString << std::endl;
	for(auto element : mVecStrings)
	{
		std::cout << element << std::endl;
	}
	for(auto element : mVecInts)
	{
		std::cout << element << std::endl;
	}
	for(auto element : mSetInts)
	{
		std::cout << element << std::endl;
	}
}
int main()
{
	Foo foo;
	foo.doSomething();
    return 0;
}
So I did NOT have to do anything as described in the wiki link above.