Thanks for the reply.
I am currently using the Advanced Serial Data Logger ver 3.9.0 build 913 with Enterprise license on a Windows 7 Professional x64.
I have successfully activated Advanced Serial Data Logger, but I need to activate SQL Database Professional plugin too (ver 3.7.3 build 920), as it is running in Demo mode.
I have keyed-in the same Enterprise serial and activated the plugin (SQL Database Professional) through the internet and a window displayed activation is successful and please restart SQL Database Professional plugin. I close the Advanced Serial Data Logger program and opened it back to check the activation status of the SQL plugin.
When I checked under the Registration Information tab, it still display Demo with the Activate button.
P.S: I am still limited to 100 data transfer even after I have 'activated'.