https://help.checkpoint.com/s/
Learn>Product Evaluation>All-in-One-Evaluation
Download the license file

cplic put -l LICENSEFILE.lic
cplic print -x (to get the hash and del old ones)
cplic del KEY_HASH (remove all the old ones)
cplic print -t (to check whether central or local)
cpstop
cpstart

upload the license file on Smart Update as well and attach. Dettach all the old ones.