With a 19-digit license key, how do I use an older version of any ComponentOne product?

If you have a new 19-digit license key, it must first be activated through the License Manager tool. If you'd then like to use an older version of any ComponentOne product (prior to 2020 v2), you can launch the legacy C1LicenseActivation tool, which will prompt you to install an old key that matches the new key's subscription time period. You will be able to use old versions of any product licensed within your subscription.

If you have a 28-digit license key, you can use just the first 17 digits of your serial number to unlock older products through C1LicenseActivation. For example, for SE307AC-3G-XXXXXX-06-6WNWR1K, you would use SE307AC-3G-XXXXXX.