If I can find it later, I will put up a tool that was shared with me a while back. I forget the name of the person who wrote it, but his name started with P. I hope he doesn't mind me sharing it, but I don't see why it would be an issue. I haven't used it in a long time, so not even sure if it still works, but I think it should.
Basically, it can view all plat on all chars, edit them 1 by 1, divide/multiply/add/subtract server-wide vs their current plat values, and a few other features. I get busy and might forget to get back to this for you, but if so, just message me or reply here to remind me again
