Welcome to INTEL forum. It is not recommended to combine/merge Intel license.dat file as this act will corrupted the license.dat file. Some feature may work, and others may not.
We suggest that you regenerate the license file in Self-Service licensing center (SSLC) https://fpgasupport.intel.com/Licensing/license/index.html
I am now able to sign in to the License Center. Thank you.
How do I regenerate a license file?
1.Quartus II SE Floating / to 10/31/2020 / computerName / 1 License / manager-me
2.Quartus II SE Floating / to 10/31/2020 / mac-address / 1 License / manager-another
a.The computerName in 1 and mac-address in 2 are from the same PC.
b.I would like to run licenses 1 and 2 on one PC. Can I merge and generate a license file for two licenses?
c.If not, can I run two license files for the same tool on a single PC?
For license generation you can refer here https://www.intel.com/content/dam/www/programmable/us/en/pdfs/education/demonstrations/online/licens...
for more you can refer Self-Service Licensing Demonstrations https://www.intel.com/content/www/us/en/programmable/support/training/demonstrations/online/licensin...