there are no known issues with 4.2.1 but some devices might have trouble with Photoshop touch.
If you could send me a log from logcat privately it would probably help to try to figure out what might be going on.
Thanks for the log, I can now see whats causing the problem.
Do you have a rooted device or a custom ROM installed?
It is a rooted device. Its running the stock rom with the bloatware stripped out, with Apex Launcher, Table UI, and Xposed Framework installed.
You need to add the fonts that are missing, which is causing this problem.
The fonts doesnt have to have been included but it might have been stripped just a little bit too much.
You can find the missing fonts here (as well as the info on where to put them):
Thank you ibarrien. Replacing the missing font fixed the app crash. The interface loaded and I was able to open the tutorials & start a project. Runs smooth. Thank you again for your help!