I have installed Soundbridge and Ritmix but I do not know how to open Ritmix. I have added directories to plugins in preferences and so on, but in the videos on youtube, Ritmix seems to be a standalone program that can be used within Soundbridge, with drum pads etc. Sorry for a stupid question, but how do I get to that?
RitMix is not a standalone program but a VST plugin. You can access it as any other VST instrument.
Provided you added the folder containing the RitMix vst to the “Preferences > VST” section it should be available in the VST browser of SoundBridge.