If you have lost your code, do not use "free" online generators, as these often contain malware or non-working keys. Instead: Old software Corel help. - TalkGraphics.com
If you have a legitimate serial number, use these steps to unlock the full version:
: If online activation fails due to server issues, disconnect your internet (disable your network adapter or unplug your Ethernet cable). Attempt to activate again; the software may provide an "Installation Code" that can be used with Corel Support to generate an offline activation key. Troubleshooting "Invalid Serial Number" Errors
: Launch the trial and immediately close it. When the dialog box appears, click Already Purchased (usually in the bottom-left corner). Enter your serial number and click Connect to unlock the software.
: If you see a "Serial number already in use" error, it usually means the code is linked to a different Corel.com account email address than the one you are currently using.