CN900 key programmer has been recently updated to the latest V2.21.3.50SC version. As the tool is available for free update, many mechanics have rushed to try the new version. However, a mechanic friend told me that he was unable to use software of CN900 car key programmer on his laptop after updating the tool to the newest V2.21.3.50SC. The software could work without problem before the upgrade.
If you have run into the same problem like him, you can try the following instructions to solve it.
First, uninstall the CN900 software in your laptop.
Second, download a new CN900 software from the link below:
down.obd2eshop.comCN900-320-NEW-software-PC.zip
Third, install the new software.
Forth, connect your CN900 key programmer to test if the software can work normally.
Learn more about CN900 key programmer: http://www.obd2eshop.com/wholesale/cn900-master-46-cloner-box.html