The key elements of Clockwork support are:

• product documentation – inline and PDF
• blog
• email support (michael@clockworksoftware.com.au): Usually free but if it’s specific to your migration and going to take hours then I’ll suggest you pay for some support.
  Of course, if it’s a clear-cut bug in the software then that’s mine to resolve
• paid support or consultancy – see the pricing page for paid options