So if you purchased Script Factory 1.0, you will continue to keep it. If you want to upgrade to the newest version, it will be a monthly fee. If you stop paying the monthly fee, you lose access to the new version.
Development has stopped on Script Factory 1.0. Only bug fixes will be applied to Script Factory 1.0, no new features or future updates. Script Factory 1.0 has been removed from the store and replaced with the brand new Script Factory 2.0 that will be the only version getting updates. Script Factory 2.0 also has Pro Edition built into it.
If you have anymore question, let me know, but a lot of questions have been answered on the main thread at the very bottom under the FAQ section.