What is the license duration and size? How many devices?

There are many TypingMagic single user license options: Annual (1-year fixed period), Monthly (recurring), Life-Time (limited availability). 

If your license is not expired or exceeded, you can reinstall the software later if necessary. The amount of device installations for Standard version license is 1 devices, and Professional version license key allows 5 device installations. It's important to uninstall the software to free up the license, if you do not want to keep using it on the device.