[Rwp] Reaper and vst plugin window

[germano carella]

Hi to all,
I downloaded trial versione of rx audio pack to remove some noise from 
my record.
When I select plugin from reaper, it doesn't appear plugin window to 
learn profile of noise.
There is a way to view this window?
With shift+p I can select some control of plugin, but I can't learn 
noise profile.
I don't know an other plugin for denoise or dehum... Some suggestions?
Thanks!