I've been playing on a Big Dig server that runs on Minecraft 1.4.7. When the launcher asked me if I wanted to upgrade the pack, I thought it would only upgrade the pack and not the minecraft jar. Now Big Dig runs on 1.5.2, and for the life of me I can't change it back. I even tried to restore the both technic and technic launcher files to a previous state, didn't work.
When I change the jars out to 1.4.7, it asks me if I want to upgrade the pack. I say no, and then it just does nothing. It only runs if I say yes to the upgrade.
Is there a way I can get a older launcher or something? I want to play on the 1.4.7 server but the launcher only works if I update everything. Any advice would be awesome.