About this guide
Hello, I own a Tekkit server, and I find it very annoying that I see people joining and disconnecting because they have a wrong build. And I've noticed there are a lot of people who don't know how to upgrade their Tekkit build to 3.1.1. That's when I decided to write a manual on how to upgrade your build.
This is how it's done
1) Start your TechnicLauncher.exe or whatever you renamed it to.
2) Go to options.
3) A new dialog will pop up. Hit "Manual build selection".
4) Click on the drop down box.
5) Scroll up in the drop down list till you find "3.1.1 | 1.2.5".
6) Hit "OK"
7) Start Tekkit and have fun!