For the usual reasons I tried to install open project, a rpm package using alien as follows,

sudo alien openproj-1.4-2.noarch.rpm
dpkg -i openproj_1.4-3_all.deb

which didn't work because of the need for a different flavour of java to the one that is installed on my ubuntu 12.04.

Using a similar procedure I installed projectlibre. Everything worked fine.

My question ... how do I remove and clean up openproj?