Unhappy Help needed for Gallery fix in ARHD 62

Hi , I need some advise on how to fix the gallery app, as it wont allow me to change theme in gallery, only stays in "clean" theme,

other users suggested that uninstalling gallery with Titanium Backup then reinstalling gallery from google play then converting it to system app with titanium backup will solve the issue,

However, I tried many times to no avail. Titanium backup wont uninstall the gallery app, everytime i tried uninstalling it, just results in a reboot, nothing more,
I also tried to convert some other user app to system app but also results in a reboot only..

As my post count isn't sufficient, I'm unable to directly post on Mike's thread ARHD 62 to ask him, so I have to post here to ask, hopefully someone will help me on this problem..


Your help is kindly appreciated! Thanks!