Send these people a question. on the FAQ page.http://www.thistothat.com/cgi-bin/glue.cgi?lang=en if you don't know the type glue used you will have to try some. If it's slightly flexible or soft you might have luck using two x-acto knives and cut off since one side is glass.
Cold sometimes will work but you will have to tread lightly. If it will fit in the freezer, overnight some super glues will get brittle and a sideways twist sometimes the parts will separate.
There is a remover for super glues available at the big box stores.
As for epoxy you can try acetone, lacquer thinner or some of the other hot solvents that are used in fiberglass work.
If it's one of the gorilla glue clones, good luck.
Been there, probably broke it, doing that!
I am not a lawyer, and never played one on TV!
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