DirectShow Filters - how to use and find correct filters

Question

I have a program that was developed using capFilter-"Ds.Net Video Capture Device" and baseGrabFlt-"Ds.Net Grabber".

I am not that familiar with DirectShow and have been trying to determine why this program suddenly stopped working on two machines that it had been working fine. I have used a program to look at the installed filters and don't see any filters named "Ds.Net".

Two questions - can I change these filters? Or how do I find them and install them again on these machines to make the application work again.