There are a couple of scenarios where you get the following error on Creately Desktop,
1. If you're installing the license key on the same computer due to an event like a hard drive crash
You need to go through a fresh installation of the Creately Desktop app. When you enter the license key you'll get a message "The License Key You Entered Has Exceeded Its Limit" This is because our system picks that you are trying to re-activate a license key which is already activated. In order to use the license key on the new installation, you need to contact our support by opening a ticket here: https://support.creately.com/hc/en-us/requests/new We'll then reset the license key at our end and you should be able to re-activate again.
2. If you are trying to use a single-user license key on multiple machines
Your Creately Desktop license only allows one user activation by default, if further user activations are required you should purchase more seats from our purchasing page https://creately.com/product/desktop/purchase
3. Transferring the license key due to an upgrade of your computer
This may occur when you're upgrading your laptop or PC. We recommend you to remove the license key from the Desktop app before you erase all the information from the old machine. Here are the step-by-step instructions to follow to transfer the license:https://support.creately.com/hc/en-us/articles/221410527-How-do-I-transfer-a-Creately-Desktop-license-to-a-new-machine-