Hi Jesse,
after I installed ChucK 1.4.0.0 I was in the same situation. I wasn't
able to load any chugin. so I just installed them from scratch and add
the path from the terminal (chuck --chugin-path:/usr/local/lib/chuck/)
and this worked for me.
I noticed that chuck looks int /usr/lib/chuck/ by default, but my
chugins are in /usr/local/lib/chuck/ .
hope this helps.
cheers,
Mario