Since it has been working before, questions is what happened on the computer? You say you removed and installed. Did you do a clean installation? I assume you run Windows 10/11.
You can use Revo Uninstaller and Advanced scanning with deletion of all found files/folders or a similar program. Follow this guide How to make a clean installation of Netcam Studio but you don´t have to do the first line “-start installation program and select Remove.” since Revo Uninstaller took care of that. Just check the rest.