Yes, it is possible in any operating system. And it is also possible the coexistence of stable, nightly and 2013 versions. If you are going to work with old versions of your projects, follow Rene_Poschi advice: make the conversion and keep the 2013 version only to check old projects, not to modify them.
Spanish actual, French actuel, actuelle, Italian attuale all mean current (as in at present, not as voltage/resistence). It is a usual false-friend.