Doitsu -- I am running Arch Linux, so my python is the latest version (3.4.3).
Installed the plugin, entered your test file, ran the plugin.... clicked OK...
Code:
ID: Section0001.xhtml href: Text/Section0001.xhtml
Open quote: "
Close quote: "
Apostrophe: '
Still running and running and running.
...
Ah, but if I click Cancel it reports success. No changes, just success.