Trying to update server

[ryuhimora]

I'm trying to update my Big Dig server from 1.2.2 to 1.3.9, but it doesn't seem to be as easy as other servers. My usual procedure is to start the new server and let it finish setting up, then deleting the world folder it generated and replacing it with the old one and any files containing player data. However, when I do this with Big Dig, it removed all of our IC2 blocks. Is there some new way to update the server? Or do I need to start looking for a way to force the Technic launcher to use Big Dig 1.2.2?

[CanVox]

You should check the change log- IC2 was removed, along with a number of other mods.