In regards to how to remove what you've done, I think from the
terminal something like "sudo apt-get purge
adobe/flash/java/or-whatever-the-executable-is-called" after sudo apt-get
remove will work if you used a .deb file from the net (not entirely sure).
But is sounds like you may have built this from source. I haven't tried to
uninstall either of the two things I built from source yet... the following
page on ubuntu forums looks like something you will want to browse:
http://ubuntuforums.org/showthread.php?t=291029

It suggests "make uninstall" or "dpkg -r"(if you used checkinstall when
building) could be a way to go. For make unistall I think you need to run
it from the folder you originally extracted the source into. Search and
delete (w/ rm) may be another (or the only) alternative.

I would just figure out how to get rid of everything then reinstall the 32
bit programs that were working for you.