Hi,
I have also a problem with transitions.ini after the upgrade - it messes up probably with some themes.
PROBLEM:
I always press 'restore default', it exists, but next time I try to enter the configuration it is the same complain. After reboot, it is again and again the same. Caught in a loop with edit disabled and mess in the desktop. Fortunately, I got out by deinstall of themes and the customizer.
Repeated install and use of theme-customizer and an-DROID theme reproduced the problem

Details:
INFO: the app found a settings file in the theme folder. the app will update both system and theme files with any changes requested
INFO: Reading the configuration from a theme folder
question about fix/restore and exit
It repeats when an-DROID theme is active, default two themes are ok. I will try other themes...
EDIT: cloudy-blue-sky is also incompatible. Moreover, I got to problems with cpu: image-viewer's got crazy, it takes 90% and cannot display most of my pictures copied from before reflash.
EDIT2: Fixing inside the theme helped to get to cssu features config menu