Arnoud Kwant wrote:
No, it isn't. I know the original/optimized media are present because I can delete the proxies using' delete generated library files', and regenerate them afterwards. I just can't view them.
What exactly happens when you try to switch by selecting Original/Optimized as in Alchroma's image? Does it still show Proxy as selected?
By the way, your phrase above does not make sense to me. Being able to delete proxies bears no relation to whether you have created optimized media or not. Optimized/Original is worded this way because FCP X will automatically use Optimized media when available, and default to Original otherwise.
You may also try Window->Revert to Original Layout.
If reinstalling, it is recommended that you use FCS Remover to make sure that all traces of the application are deleted. And then you'd need to download a fresh copy from the App Store, and also download the additional content from inside the application.