At the moment, I only need Aspose Word for a single web app on a single domain. If I purchase at that “level”, can i pay the difference if I later need to use it for external windows apps? or do I have to repurchase the entire product? Also, can you upgrade to Aspose.Office later?
If you purchase Aspose.Word and later want to upgrade to Aspose.Word with different license options, it is very easy. You just place an order an pay the differences in price.
There is no direct way to upgrade from Aspose.Word to Aspose.Office, but if you talk to Ben Li, he might give you some discount in this situation.