You'd better google for that.
There's a bunch of sites providing 1.13d package out there.

And you don't even have to install it.
Just unzip the package to a folder and then let C3PO know the folder name.

I've followed all instructions 100%, I have a 100% clean install of Diablo 2, and I have the freshest c3p0 download. No anti-virus enabled, windows defender turned off while trying to load, and I get the same problem as another poster. The application freezes for some seconds, then just nothing happens.

I've tried windowed and full, I've tried right clicking the items and selecting "Launch Diablo II Only" and "Launch with R2D2 loaded" on both windowed and full mode, none of these even load Diablo 2 at all. Not a crash, not load and then close, no Diablo 2 screen shows up period.

I really want to play on D2X2 but I don't see any way if I can't get this to work??

Please help sir DanGoon! Please!

Edit: Crap! I read the file wrong and thought it told me to update to 1.14d, but it says NOT to update to 1.14... any clue how I downgrade? I'm using the digital version that only has 3 dll files, binkw32.dll ijl11.dll and SmackW32.dll, all the other ones like D2Client and stuff aren't in my folder.