If you have a HowtoForge subscription, you can download the new version for free. If you've bought a single copy of the manual, you will have to pay for the new version again, as outlined on http://www.howtoforge.com/download-t...onfig-3-manual
"What Does the ISPConfig 3 Manual Cost?
You can download it either through an active HowtoForge subscription, or you can buy a single copy.
Downloading through a HowtoForge subscription has the advantage that you get updates of the manual for free as long as you are a subscriber, while if you buy a single copy, no updates are included (i.e., you would have to pay again for new versions of the manual).
A HowtoForge subscription costs 5 EUR for one month or 25 EUR for six months.
If you want to download a single copy of the ISPConfig 3 manual, this costs you 5 EUR which is equal to buying a one-month HowtoForge subscription."
If the single copy included any updates, we would be forced to charge more than 5 EUR because a lot of time and work went into that manual (more than six months). I hope you can understand that.