If I purchase ET GeoWizards for ArcGIS 9.1, do I need to purchase the version for ArcGIS 9.2 when I upgrade?
No. Our products come currently in 2 sub-versions – for ArcGIS 9.1 (supports 9.0 as well) and for 9.2 and above. A license of each product is valid for all the sub-versions of the software. When you switch to ArcGIS 9.2, you just need to uninstall your current ET GeoWizards and ET GeoTools versions, download and install the version for ArcGIS 9.2. You will only need to purchase an upgrade when your one year free maintenance has expired. The above is valid for ET GeoTools too.