Dear Tony,
According to your description, I think we can play an over install of Groove
with the latest version and then test the results.
For your convenience, we can refer to these steps:
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A: Please shutdown the Groove on the machine.
B: Please download and run the installation from the following location:
http://components.groove.net/Groove/DailyBuilds/latest/OCI/Setup.htm
Over installing will not remove any licenses or remove any account or space
data for your Groove account. There is also no need to uninstall first.
Restart the computer once the installation is complete. Groove will have been
added back to the startup and will load. Log in to the account.
(The key to this process is when the install completes it will reregister
all the DLL Groove uses. By performing the over install you have all the
latest fixes and all the DLL will get registered. It is possible that another
software install or update affected one of the Groove files causing this
error.)