you can use the Repair-Function in NATIVE ACCESS if you have problems regarding updating or reinstalling an NI product:
If the Repair-Function will not solve your issue, please use our NI Reg Tool in order to reinstall the product with NATIVE ACCESS.
Download the Tool here:
Afterwards, the deleted product will appear in NATIVE ACCESS under NOT INSTALLED.
Let me know if you need further assistance or information.
Michi @ NI