From line numbering I'd say your kde4/app.py is still from 1.0.10. Please remove Backintime completely 'sudo apt-get remove backintime-common backintime-kde4' and make sure '/usr/share/backintime' is empty. Than reinstall it again.
From line numbering I'd say your kde4/app.py is still from 1.0.10. Please remove Backintime completely 'sudo apt-get remove backintime-common backintime-kde4' and make sure '/usr/share/ backintime' is empty. Than reinstall it again.