How to solve problems withKEY files Associate the KEY file extension with the correct application.On, right-click on any KEY file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.key files". ...
If it helps, when it comes time to diagnose problems, these tools will be a lot more than "fun stuff" and will pay for themselves. You should be able to do the whole deal for less than $150 if you get a cheap Android tablet off eBay or something. ForScan is about $5, Torque Pro...