How would any future plans affect the older freely available version, unless those plans were to restrict it / force users to purchase a newer release? Maybe people would be less suspicious of your motives if you were more open about it?
You are a business - you may well decide at some point to change direction. You do not have the history of aminet as a reliable distributed software archive available from many international mirrors.
Don't be surprised. You handled it badly. Maybe you should have waited ? The file is still not downloadable from your site btw.