Thanks for the system profile. One thing that stands out is that there are almost 500 fonts in /Library/Fonts. This can cause conflicts with the fonts that UTC is trying to activate, which could result in unexpected font issues.
Can you go through the steps described in this KB article: extensis.com/support/knowled ... -yosemite/
It was written for Suitcase Fusion, but the same steps are applicable for UTC.
In case that doesn't take care of the issue, can you send me another private message with a copy of the system log (found in /var/logs) from that user's machine?