Hi,
Information to contact support is the FAQ pages with software. You can find information and support support request at http://www.nch.com.au/switch/support.html.
Also, did you reinstall a back up copy of the software installer file that you purchased.
You will need to install the original setup.exe file that you downloaded when purchasing your license. Since your ID Key information is locked into a particular version of the software that was purchased. NCH does not keep old versions of the software, it is for this reason that you are advised to make a backup of the software at the time of purchase. To avoid losing the installer or original setup.exe you should always make a back-up of any software using a CD-ROM, flash drive, or zip disk for future re installs.
Your registration and activation code will work on any fix or new version of the software released within 3 months from the date of purchase.
Your registration and activation code may work on any fix or new version of the software release within 12 months from the date of purchase unless the new version
is a major version change. You will always be entitled to discounted upgrade pricing.Use www.nch.com.au/upgrade to purchase.If you do not want to purchase an
upgraded license you need to make sure that your software is not upgraded to the latest version once you successfully register the software.