All pre-7.0.0 versions of Gigapixel will upgrade through 7.0.0. This means if you’re on 6.3.3, the in-app upgrade flow will take you to 7.0.0, and then you can see 7.0.3 from that version. You may optionally also download the installers directly from this thread. They should automatically uninstall Gigapixel 6 for you before installing the updated version, hence no longer needing to clear their registry.
If you’re still have trouble installing, please send a Support ticket so we can do a more thorough investigation.
