wow, that was fast lol.
I am attaching the .lua file, all you have to do is compare line 36 and 93 to see the changes and you can just copy over the file you have now. If you are uncertain where it is, the .lua is the TellChannel.lua located in the modules folder.
Note: Don't use the WoWMatrix updater becuase it will reset all the settings and the files, and your music. Again, not sure if anyone will be updating this or not, hope so though :)