ImportError: cannot import name Comicvine

[quantissimo]

I changed "PyQt4.Qt import QWidget, QGridLayout, QLabel, QLineEdit" to "PyQt5.Qt import QWidget, QGridLayout, QLabel, QLineEdit" in config.py and re-bundled the plugin zip file.

But now I receive:

calibre, version 2.68.0
ERROR: Unhandled exception: ImportError:cannot import name Comicvine

calibre 2.68 [64bit] embedded-python: True is64bit: True
Windows-8-6.2.9200 Windows ('64bit', 'WindowsPE')
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM (6, 5, 1)
Traceback (most recent call last):
File "site-packages\calibre\gui2\preferences\plugins.py", line 315, in add_plugin
File "site-packages\calibre\customize\ui.py", line 417, in add_plugin
File "site-packages\calibre\customize\ui.py", line 55, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 195, in load
File "site-packages\calibre\customize\zipplugin.py", line 179, in load_module
File "calibre_plugins.comicvine.init", line 4, in
ImportError: cannot import name Comicvine

[kermititan]

I've solved it just restarting calibre.
Look at post #44 http://www.mobileread.mobi/forums/showthread.php?t=213049&page=5
It seems it gets stuck with a previous cached file.