3.52 M33-2 version themes..a noob question

I have looked on the web and this page,
and it mentions themes for 3.52 M33-4 version can these be used on 3.52 M33-2 version

No. But how hard is it to update from version 2 to version 4 there is no real difference but it has a few important updates.

If your going to update you still have to update to 3.52m33#3 to get to #4. You dont want any mishaps while updating