If I buy Stage 1 Software how much it will it cost to move to Stage 2 or Stage 2+ Software? What about if I want to upgrade to K04 software?

If I purchase a Programmer, how many tuned files will I receive?

 Can I reuse the Programmer on cars other than mine?

Why do I have to have stock software on my ecu before using the programmer? You can’t flash over competitor software?

My Programmer is unusable, I erased it before flashing to stock how much is a new programmer?