Lady Ursula

The owner of a server has not updated to 1.0.7 because he heard that it caused some bugs, so how do I downgrade to build 1.0.5? I've tried a bunch of different things, but none of them seem to work... Edit: I've figured it out, never mind. But here is how I did it for anyone wondering. Step 1: Open the launcher. Step 2: Select the modpack you wish to use. Step 3: Click on the gear next to the modpack, not the one near the X. Step 4: Clicks the menu next to "Select Build" and select your version.