How to remove glued capacitor from the board?
The cap is made of aluminum, wrapped in a plastic jacket.  The jacket is glued down.  Can you slit the plastic and remove the capacitor, leaving the jacket where it is?
Otherwise, try a bit of acetone on the glue and see if it softens any.  (Acetone + perfume =  nail polish remover.)
If it's a hard brittle substance, try using a hammer and punch to dislodge the capacitor.  If that doesn't work, try a bigger hammer!
Last resort: