Uninstalled and reinstalled all extensions, cleared cache, did not work. Uninstalled again, and completely removed Dreamweaver itself, reinstalled Dreamweaver and then ran 12.1 update, then reinstalled extensions. Still does not work. Uninstalled all extensions again and uninstalled Dreamweaver again. Reinstalled Dreamweaver and this time DID NOT install the 12.1 update. Installed extensions and everything works. Looks to me like your extensions are not compatible with the 12.1 update.