If you had read this thread before you would have seen the information that the “No Duplicates” issue is solved already and will be part of the next update version.
If I remember correctly, Excel is commercial software, too. And I am not quite sure which subscription price is cheaper. (In fact, I am pretty sure.)
If you are really able to implement the “No Duplicates”-feature in Excel in a more comfortable way than is possible in Panorama X already now using Gary’s workaround, I invite you to teach that Excel technique to me — and I am not too bad in Excel. Filtering and searching duplicates after you have entered new data is not the same what you are asking for here. (And that could easily be done in Panorama X as well.)