Ver 3.8 missing kepub conversions

Just tried to install again, and everything is now OK, go figure.

Just updated to 3.6 and kepub conversion has gone missing.

Tried installing reader/writer/output and I get these

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 726, in _install_clicked
File "site-packages\calibre\customize\ui.py", line 461, in add_plugin
File "site-packages\calibre\customize\ui.py", line 60, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 199, in load
File "site-packages\calibre\customize\zipplugin.py", line 183, in load_module
File "calibre_plugins.kepubmdreader.__init__", line 7, in <module>
ImportError: cannot import name KEPUBMetadataReader

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 726, in _install_clicked
File "site-packages\calibre\customize\ui.py", line 461, in add_plugin
File "site-packages\calibre\customize\ui.py", line 60, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 199, in load
File "site-packages\calibre\customize\zipplugin.py", line 183, in load_module
File "calibre_plugins.kepubmdwriter.__init__", line 7, in <module>
ImportError: cannot import name KEPUBMetadataWriter

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 726, in _install_clicked
File "site-packages\calibre\customize\ui.py", line 461, in add_plugin
File "site-packages\calibre\customize\ui.py", line 60, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 199, in load
File "site-packages\calibre\customize\zipplugin.py", line 183, in load_module
File "calibre_plugins.kepubout.__init__", line 7, in <module>
ImportError: cannot import name KEPubOutput

Thanks,

Steve