Hello Gordon,I had the same error message after uninstalling the previous version and then attempting to install 3.98. Very strange! I will give it another go.
Best wishes, Clive Pallett
No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 9.0.698 / Virus Database: 270.14.40/2471 - Release Date: 10/31/09 07:53:00