Hi Reid.
Its Sad but for ages Chat has been not working, 4.10.9 is the last working chat
untill now, Lotr says 4.12.11 works, I believe its just the 4.13 beta.
But even if you choose a version where Chat works, you will only be able to chat with people as stated using up too 4.10.9 Then the 4.13.
If someone Has used chat on 4.12.11 please say so here.
Reid the one you have should work but the problem is as its getting very old
java may soon no longer support it, when that happens you will have no choice but to update.
Hope that helps you to make a choice.
Peace.

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mickjapa108