Hey I have m+ 3.63.148 (we are still on lcs 2003).
We're all english, so no Right-to-Left issue.
the tabbed chats settings are all grayed out, can't check or uncheck anything.
After i had 3 simultaneous windows, I got a pop-up asking me if I wanted to enable tabbed. I said yes, and now the option is checked, but I can't change it.
