A signed installer
The file is a digitally signed .msi. Depending on your machine’s settings, Windows may show a SmartScreen warning on first launch: that is normal behaviour for a little-known publisher, not a sign of a problem.
You can check the signature yourself: right-click the file, Properties, "Digital Signatures" tab.
Updates are automatic
SafeTale checks at startup that it is up to date and updates itself. You will not have to come back to this page.
One consequence worth knowing: if the update server is unreachable, the application refuses to start rather than run in an unknown state.
What happens next?
Allow about ten minutes to create your account and fill your vault, then thirty seconds to name your trusted contact. The "Getting started" guide walks through the steps in order.