First, a quick clarification:

Official flash programming for FCA/Stellantis vehicles requires a paid subscription. As of recent standards:

What Are You Actually Getting?

When you dig up these old .swf and .fla files today, you aren't just getting code. You are getting:

What Are TechAuthority Flash Files?

A "flash file" is essentially the operating system for a specific electronic control unit (ECU) in your car. When a manufacturer discovers a bug, improves fuel economy, or fixes a transmission shifting issue, they release a software update.