While the license key itself is perpetual for the versions released during your maintenance period, the "maintenance" part of the purchase eventually expires—typically after 1 or 2 years. Chilkat Subscription Explained
: Covers all developers at a single physical company location. How to Use a Chilkat License Key chilkat license key
: The software is unlocked at runtime by calling the UnlockBundle method (for the full bundle) or the UnlockComponent method (for individual components) at the start of your program. While the license key itself is perpetual for
Chilkat.Global glob = new Chilkat.Global(); // Replace "YOUR_UNLOCK_CODE" with your actual purchased key bool success = glob.UnlockBundle("YOUR_UNLOCK_CODE"); if (success) { // The library is now ready for use } else { // Access error details via glob.LastErrorText Console.WriteLine(glob.LastErrorText); } Use code with caution. Understanding Maintenance and Upgrades Chilkat
: Chilkat’s licensing system does not require an internet connection to "call home" or verify the key against a server. The key is verified locally using a built-in algorithm.