Download Vanilla Minecraft from here
Click on Create Profile in the lower right hand (If not already done)
Click Launch to launch Vanilla
On the small launch screen select the small 3 line menu bar next to the MINECRAFT logo
You should see News, Skins, Settings, Launch Options. Click launch Options.
Click on the button for Historical versions. Click Add new. Select the release version as shown here. Save the configuration (You can experiment with the resolution when you are happy the game loads and plays.) Click News. Select the Green up arrow next to play and select the release version. Click Play
Server ip: vanilla2.devcoftb.net