Solution
It is a known issue in LabVIEW 2017, 2018 and 2019 64 bits. In order to fix it, try the following steps:
- Uninstall the invalid toolkit from both 32 and 64 bits LabVIEW as described in Download & Manage LabVIEW Add-ons with VI Package Manager (VIPM)
- Make sure the *.lf file under <ProgramData>\National Instruments\Partners\<Invalid Addon>\Licenses manually deleted.
- Manually delete the Computer\HKEY_LOCAL_MACHINE\SOFTWARE\National Instruments\LabVIEW\<Version>\PartnerAddons\<Invalid Addon> folder in Windows registry.
- Replace the original one in <ProgramFiles>\National Instruments\LabVIEW Version\resource\Partners\RegisterAddon.exe with attachment.
- Reinstall the wished Third Party LabVIEW Add-on.
- Activate it from Third Party Add-on Activation Wizard.
This should activate the add-ons correctly and will allow to avoid this scenario in the future.