I tried that command and I get the following error:
C:\Users\Administrator.NXASRV2015>saplicense -pinstall ifile=ERP_standard_license_key.txt
*** SAPLICENSE (Release 742) ERROR ***
ERROR: Can not set DbSl trace function
DETAILS: DbSlControl(DBSL_CMD_IMP_FUNS_SET) failed with return code 20
RC-INFO: error loading dynamic db-library - check environment for:
dbms_type = <db-type> (e.g. ora)
DIR_LIBRARY = <path to db-dll> (e.g. /usr/sap/SID/SYS/exe/run)