How to add other plugins to control panel? de-esser etc?

Hello I wonder if someone can help me out here as I don’t really know what I’m doing.
I love the live editing on my ur44 with dspmixfx software, I use the compressor and eq a lot and really need to add a de-esser of some sorts.
I cannot seem to find a way to bring a vst plugin into the plugin folder of dspmix and have it show anywhere.
I really don’t want to buy a hardware de-esser and loose the great quality of the preamps on the ur44.

Can anyone advise how to import a de-esser plugin into the panel?

Thank you very much.


unfortunately it is not possible to load VST plugins.