Rodrigo, he didn't install from a repo package. He has no package to remove, unfortunately.
"removepkg acroread" worked here, even though it came with the installation of 5.9 (deluxe) .
After removing, however, there is no package in the repo that I can see, so reinstalling is not possible (except by downloading and running the adobe script).
Also, the adobe installation does not seem to add an icon and .desktop file.
I cannot run foxit reader, either... always get a segfault.