Get Invoryx on your machine.
One installer, everything included. The app opens on its activation screen and asks for your license key, so download it whenever you like and activate when you have a key.
Your computer may warn you first
Invoryx is not code-signed yet, so Windows shows a SmartScreen notice (More info, then Run anyway) and macOS needs System Settings, Privacy & Security, Open Anyway. Nothing is wrong with the file; a signing certificate is on the way.
No key yet?
You can install and look around, but invoicing needs a license. and your key appears the moment payment completes. Lost your key? Email support@invoryx.app from the address you paid with.
Every version
Older builds and release notes live on the releases page. The app also checks for updates itself, from Settings, and updates are free forever.