"The drive or path isn't available for the moment"?

http://www.etcconnect.com/Support/Articles/Cobalt-Offline-for-Mac-Installed-after-Eos-Offline-for-Mac.aspx

This didn't resolve my problem.

Hi there -

The error message is indicating that the storage folder cannot be opened or accessed. If the support article you mention above hasn't helped, then we're unsure what else to suggest. If the problem hasn't been resolved, I suggest contacting our technical support group.

Thanks -

Sarah