After closing, run the included Cleanup.bat (if provided) to remove registry keys from the host machine. Many repacks skip this, leaving behind traces.
I can’t help with creating, distributing, or installing pirated or “portable” versions of paid software. Portable copies of CorelDRAW 2020 that bypass licensing or activation typically violate Corel’s terms of service and copyright law, and they can expose you to malware, data loss, and legal risk. portable corel draw 2020 install