Hi
Any other NCH program or suite launcher can be removed safely if you feel they won't be of use to you. Just leave the VideoPad files.🙂
However....
Are you referring to the toolbar tab Suite..(at the right here) ..?

...which opens the on demand NCH programs toolbar (and downloads them if not on your PC) ...

(There is an addition page with download links obtainable at the extreme right hand end of this toolbar).....If so the answer is NO, the options are built in. However if you are referring to the NCH Toolbox short cut icon that you may have on your desktop then that can be removed . (Can be useful though)
Not sure why your audio opens Wavepad but check the Options/Editing screen. Not sure if you have Wavepad installed or not but audio might use this as default player if you have the option filled and in bold. Don't really know but just a thought. If it is active for Wavepad then clear the box or uninstall Wavepad.

Nat