How come the filter applied excludes all models?

Max,

there are occasional discrepancies about how a leading slash is handled. Can you try both with the slash and without?

Did you see result from Clarity-Filter3.png?

I added include = rvt and exclude = a value and still get wrong result

Can you provide an picture of an example?

I have see Clarity-Filter3.png but still confused and result not as expected

I have see Clarity-Filter3.png but still confused and result not as expected

Max,

Agree it's a bit counter intuitive - we keep meaning to change it or change the UI to tell you this.

You have to have at least one "Include" filter. So start with "Include everything that ends with .rvt", then you can add an exclusion.