Thanks for the question. I understand you are experiencing issues with iTunes in relation to a third-party plugin. Let’s see if we can isolate this issue by starting iTunes in safe mode:
There are several ways in which an add-on can cause iTunes to act erratically, such as those listed below:
- Loss of iTunes functionality, such as the Visualizer.
- Distortion or irregularity in the iTunes interface.
- Slow performance.
- iTunes won't open or quits unexpectedly.
- You see an alert while syncing stating "... cannot be synced. A duplicate file name was specified."
If you notice any of the above symptoms or other unusual behavior, you can disable any plug-ins not manufactured by Apple by opening iTunes in Safe Mode. This is done by holding down the Option and Command keys (on Mac OS X) or holding down the Shift and Control keys (on Windows) while opening iTunes. If performed correctly, you should see the following dialog before iTunes finishes starting up:
"iTunes is running in Safe Mode. Visual plug-ins you have installed have been temporarily disabled."