Just to clear the obvious out of the way - I presume this is what you attempted:
Instructions for using this license key:
- Select and copy (Ctrl+C) the multi-line license key above
- Open the "About Box" in the program of ours that you want to register (from menu choose Help->About) [or access via tray-icon context menu]
- Click the "Enter New License Key" button
- Paste this text it into the application and Click "Accept" [paste via Ctrl+V, or via button]
- You can check or change your license status at any time from this About box
https://www.donationcoder.com/Keys/I notice in that "Enter New License Key" dialog, you can also load it from a file - you could try that as a workaround:
create a text file with a
.dat extension, and paste your license into it. Browse to the file from the "Enter New License Key" dialog. (Note: my license starts with
*r1; and is paragraph length.)