Tifflotechnia Vocalizer error


Today, when I turned my laptop on, NVDA shows a Vocalizer license is invalid error. When I view the NVDA log to figure out what's wrong, I came across these lines:
Traceback (most recent call last):File "wx\core.pyc", line 2196, in Notify  File "C:\Users\nut\AppData\Roaming\nvda\addons\vocalizer_expressive_driver\globalPlugins\vocalizer_expressive_globalPlugin\__init__.py", line 130, in _renew    if _getValidationClient(self._activationCode) is None:  File "C:\Users\nut\AppData\Roaming\nvda\addons\vocalizer_expressive_driver\globalPlugins\vocalizer_expressive_globalPlugin\__init__.py", line 93, in _getValidationClient    email, password = storage.getCredentials()  File "C:\Users\nut\AppData\Roaming\nvda\addons\vocalizer_expressive_driver\synthDrivers\vocalizer_expressive\storage.py", line 100, in getCredentials    data = pickle.loads(raw)UnicodeDecodeError: 'ascii' codec can't decode byte 0xd0 in position 4: ordinal not in range(128)
Any idea on how can I get my Vocalizer working again on my laptop?

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