Yes, you can get older versions here. You can even use multiple version simultaneously if you pick the portable editions.
It is understandable that once you get used to anything, any significant change is perceived as negative. Though, if you give it time, you may actually start having the same feelings when you see the older version. There are some significant improvements in the 2013.1 version, which allow you to reach a whole different level, namely vector layers and the Shape tool.