In 2018, I installed standalone SEP 14.0.03876 from my employer for my home use 32-bit PC. How can I transfer this to my new 64-bit PC?
You cannot install a 32-bit client on a 64-bit PC. You would need to obtain the 64-bit client from your employer for home use and install that on the 64-bit PC. You should also uninstall the standalone SEP client from the 32-bit PC.