I still get two "Help Content Manager: The specified content does not exist or is unreadable." errors. But afterward I get a "Help Content Manager: Do you want to install untrusted content?" message - click yes.

In the Event Viewer/Windows Logs/Application I get three Errors from HlpCtntMgr. They are:
Help Content Manager exited with error: InvalidCmdArgs
Help Content Manager exited with error: InvalidCmdArgs
Help Content Manager exited with error: NoBooksToUninstall

The good news is that the install did put an OPC Labs folder in the start menu programs folder and it looks like everything is there.

Hello,
the new currently posted build (5.30.1034.1) has a fix for the VS 2013 help integration.

Best regards

I have found a problem which causes errors when attempting to install the help contents into VS 2013 (VS 2012 would work well). We will fix it and post an update here.

It is not clear what caused the missing folder/icons. Hasn't there been a "premature" restart during the installation? Anyway, after the fix for the above is available, reinstall and see if it helps.

Best regards

I have visual studio versions 6.0, 2010 Pro SP1, and 2013 Pro installed.

Hello, thank you for reporting this.

Which version(s) of Visual Studio do you have installed on your computer please?

Best regards

Trying to perform a Full Installation (minus com interop components) of this version I get an error message stating:
"Help Content Manager: The specified content does not exist or is unreadable."

After dismissing the message (twice) I looked in the start menu and there is no folder for the product, but I did not have the option selected to not create a start menu folder.