Is the license fee time-limited?
Is the license bound to a operating system?
Your license is valid indefinitely for the version of SKAT that you bought. Newer versions of SKAT may cost an update fee.
I have a new computer. How can I continue to use SKAT?
Yes, your SKAT for Windows license is valid only on Windows.
You can buy separate licenses for Mac, iPhone and iPad in the Mac App Store and in the iTunes App Store.
The SKAT license is bound to a person, not to a computer. You can install SKAT on a different computer, as long as you ensure that only you are using the app.