Jolly good! Installed everything even though I don't want a lot of it, and 13.1 would run, and would compile my project, but it would not link it.
Initially it complained about fbin/Debug/exename (link command had -ofbin/Debug/exename)- no such file or directory. So I added
-of bin/Debug/exename to the linker commands, and that seemed to fix that. But then the order in which the libraries were listed was wrong, and so there were unsatisfied references - with the same project file.
So not having the time to sort that out today, I uninstalled using
apt-get remove --purge codeblocks
apt-get remove --purge codeblocks-common
Then I reinstalled 10.x from the Ubuntu 12.04 repo, and now that won't run - undefined symbol: _ZN7Manager7isBatchE
Thanks for your help.