Comment 1 for bug 159223

As a workaround, people can run the following command to remove the configuartion filea and Data.fs before installing the current version of schooltool.

$ apt-get remove --purge schooltool

Or, if schooltool has already been removed (but not purged):

$ dpkg --purge schooltool

As for automatically detecting old installs and moving stuff out the way. Should it just silently happen? Should there be some kind of UI question? Or perhaps we should just fail new installs with instructions to do the above (not sure how that will gel with synaptic)?