Posted by:
Si From Beat...
Did you import CharGrp.txt into VTT? VTT doesn't do this automatically such as not to inadvertently overwrite character groups that have been changed manually.
To import CharGrp.txt, choose Tools => Prepare font... and check "Import character group" only. Also, make sure that VTT knows where your CharGrp.txt file is located. These file locations are configured in Tools => Options => File Locations. Verify that "TrueType Talk" points to the respective folder.
Hope this helps