Hello Martin Kahr Knudsen,
Please follow the steps on the following KB article attached in order to return licenses.
https://community.altair.com/community/en/how-to-borrow-and-return-licenses-from-altair-license-utility?sys_kb_id=a8470de41bb2b410507ca6442a4bcbbd&id=kb_article_view&sysparm_rank=1&sysparm_tsqueryId=66704bd71ba175d0c4dfdbd9dc4bcbef
Best regards,
Anastasia-Maria Riga
