The temporary license is not intended to support functional applications for a long period. NI never recommends building permanent or long-term applications using a temporary license.
If the computer you are trying to activate the software on a computer that does not have internet access, you can use your serial number to generate an activation code from another computer that is connected to the internet.
This can be done by using the NI Product Activation
page. You will need the computer Id of the computer you want the software to be activated on. For help finding this, see: Finding My Unique NI Computer ID for Activation and Licensing